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Multilingual Voice Recording Project – Code-Switching Conversations Project Name: BV Project Type: Remote | Ongoing (Limited Slots per Locale) Project Overview Project BV is a multilingual speech data collection initiative designed to enhance Automatic Speech Recognition (ASR) systems for high-value multilingual call center scenarios, including financial services, healthcare, and telecommunications. The project focuses on collecting natural code-switching conversational audio, where speakers alternate between two languages within a single conversational turn. Scripts will be provided; however, natural delivery, fluency, and context-appropriate language switching are essential. Language Requirements Primary Language (Native level – one required): Vietnamese (vi-VN) Secondary Language (Required): Participants may be located anywhere globally, provided they are native in Vietnamese (vi-VN) and fluent in English The Project Manager will request language verification samples for both primary and secondary languages. Participation Structure Participation is one-time only per speaker. Two speakers will form a pair (agent and customer roles). Speakers do not need to be in the same location. Scripts and recording instructions will be provided. Zoom is the preferred method for recording the conversations. Audacity is the preferred tool for converting audio files to the required sample rates and for verifying signal-to-noise ratio compliance. Recording Scope Target volume: 200 hours of audio per locale Per pair output: 1.2 hours of recorded audio Quality acceptance: Minimum 80% usable speech hours Compensation (USD – Per Pair, 2 Speakers) All rates below are paid in United States Dollars (USD) and apply to one hour of final audio (30 minutes per speaker). Payment is split evenly between the two participants. Vietnamese (vi-VN) USD 30 per participant Recording Specifications File Format: Stereo WAV Left channel: Agent Right channel: Customer Sample Rates: 8kHz (telephone quality) – 50% 16kHz – 50% Code-Switching Ratio: 70% primary language 30% English ±10% tolerance Delivery Style: Natural, context-pecific language switching No forced or artificial transitions Speaker Requirements Age Distribution Targets: 18–25 years: 30% 25–40 years: 30% 40–65 years: 20% 65+ years: 20% Gender Balance: 50% male / 50% female Language Proficiency: Fluent is mandatory; non-fluent speakers will be rejected Vietnamese (vi-VN) is mandatory Participation Limit: Each speaker may participate once only Audio Quality Standards Minimum 25dB signal-to-noise ratio No background noise, distortion, clipping, or echo Quiet, controlled recording environment required Headset or professional microphone strongly recommended How to Apply Applicants should be prepared to provide: * Native language and Vietnamese (vi-VN) proficiency details * Age range and gender * Confirmation of one-time participation * Language verification samples upon request * Participants will be placed in a group chat with others of the same language to work out who will work with whom for the recordings. The project will close once all required recordings are collected. Apply and wait for the next steps if deemed by our team that you qualify. Note: If you do not hear from us, consider that you do not qualify for this project
Project ID: 40326294
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24 freelancers are bidding on average $35 USD for this job

Hello, I’ve carefully read your project requirements and understand the need for natural, high-quality code-switching conversations with strict audio standards. I work with a small team that includes fluent Vietnamese speakers and English speakers, and we can deliver clear, natural, and context-appropriate recordings that meet your guidelines (70/30 language balance, clean audio, and proper channel separation). We are familiar with tools like Zoom and Audacity, and we can ensure recordings meet the required sample rates and noise standards. We’re ready to organize speaker pairs quickly and begin recording immediately. Looking forward to working with you. Best regards, Timothy
$30 USD in 2 days
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I am a Vietnamese native speaker with at least 5 years of professional English work. I can provide a good voice sample as a 27-year-old female.
$30 USD in 7 days
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"Hi there, I am writing to express my strong interest in the BV-Vietnamese project. As a dedicated and detail-oriented freelancer, I have developed a solid foundation in data verification, content management, and administrative tasks, ensuring that every project I undertake is completed with the highest level of accuracy and professionalism. I take pride in my ability to follow complex guidelines strictly and deliver results that meet or exceed client expectations. What sets me apart is my commitment to efficiency and reliability. I understand the importance of deadlines and am prepared to dedicate the necessary time to ensure this project is completed promptly without compromising on quality. I am a quick learner, highly adaptable to new platforms or tools, and I maintain clear, consistent communication throughout the working process to ensure total alignment with your requirements. I am available to start immediately and would welcome the opportunity to discuss how my skills can contribute to the success of your project. Thank you for considering my proposal, and I look forward to the possibility of working together.
$30 USD in 3 days
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I am a native Vietnamese speaker and fluent in English, with a natural ability to switch between the two languages in conversation. I lived in the Czech republic for over 20 years, where I studied English. And of course, I speak Czech at a native level. I hold dual citizenship (Vietnamese and Czech) and have extensive experience communicating in multicultural environments. This allows me to deliver natural, context-appropriate code-switching without sounding forced, which is essential for realistic call center scenarios. Currently, I am based in Vietnam and can easily coordinate recording sessions. I am able to follow instructions carefully, ensure high audio quality, and work in a quiet environment with proper equipment. I am also reliable, detail-oriented, and committed to completing the project according to all guidelines. I confirm that I meet the language requirements, am available for one-time participation, and can provide language verification samples upon request. I am confident that my background and communication skills make me a suitable participant for this project.
$30 USD in 7 days
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Hello, I would like to apply for Project BV. Native language: Vietnamese (vi-VN) Fluent in English (Bachelor’s degree in English, many years of translation experience) Age range: 40–45 Gender: Female Confirm one-time participation: Yes Available for Zoom recording and able to meet audio requirements I can provide language verification samples upon request. Looking forward to your consideration. Thank you!
$30 USD in 7 days
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I am a 19-year-old Spanish language student with a native Vietnamese accent and fluent English. I have practical experience in creating content and editing audio/video for my social channels. I can ensure high-quality audio with clear code-switching and follow all technical requirements strictly. Looking forward to working with you!
$30 USD in 2 days
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I'm a native Vietnamese speaker currently living in Vietnam. I've had experience working in the translation field in Vietnamese and english for 5+ years. My voice is clear, vibrant, and nice, I have the ability to record my voice with high fidelity to the script, accuracy and audio clarity. I also lives in the UK for a while. I'm very fluent in english.
$30 USD in 7 days
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I'm a 35-year-old male native Vietnamese with over 10 years of experience meeting English, Japanese, and Vietnamese language needs. I confirm that it is a one-time participation. I'm looking forward to hearing from you.
$30 USD in 1 day
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Hello, I’m a native Vietnamese (vi-VN) speaker and fluent in English. I can deliver natural, fluent code-switching conversations with clear pronunciation and context-appropriate language use. I have access to a quiet recording environment and can use Zoom and Audacity to meet your audio and quality requirements. I’m also happy to provide language verification samples if needed. I’m ready to participate and coordinate with a partner. Best regards, Hien
$30 USD in 3 days
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"As a native Vietnamese speaker with 5+ years of translation expertise, I bridge the gap between English and Vietnamese perfectly. My background includes time in the UK, ensuring excellent English fluency. I bring a vibrant, clear voice to your scripts, delivering high-quality audio with meticulous attention to detail and accuracy
$30 USD in 2 days
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I am a native Vietnamese speaker with fluent English communication skills, and I am very interested in participating in Project BV. I can speak naturally in both Vietnamese and English and am comfortable with code-switching conversations in professional contexts such as customer service and daily communication. I have access to a quiet recording environment, a stable internet connection, and suitable audio equipment to ensure high-quality recordings that meet the project requirements. I am also able to follow recording instructions carefully and deliver files on time. I confirm that this will be my one-time participation, and I am available to provide language verification samples whenever needed. I look forward to the opportunity to work with your team.
$30 USD in 7 days
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Dear Project Manager, I am a native Vietnamese speaker from Vietnam, currently 39 years old, with strong fluency in English. I often code-switch naturally between Vietnamese and English in daily conversations and work, which makes me a strong match for this code-switching voice recording project. Looking forward to contributing to Project BV. Best regards, Bac Do
$30 USD in 7 days
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Having grown up and lived in Vietnam, Vietnamese is my mother tongue, and I am highly proficient in English as well. My strong language skills and fluency in both Vietnamese and English makes me the ideal candidate for Project BV. Not only can I deliver fast, but I also pay close attention to detail, ensuring utmost accuracy in all my translations. In addition to having a decade-long experience as a translator, which includes code-switching as part of my profession, makes me well-versed with the nuances of such conversations. As an added advantage, I am well acquainted with tools like Audacity and Zoom, which you have mentioned as preferred methods for converting audio files and recording conversations. These skills combined with my commitment to meeting deadlines and producing high-quality output make me the perfect fit for this project. Reach out to me so that we can begin contributing to enhancing your multilingual ASR systems today!
$30 USD in 7 days
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As a linguist, I offer strong vocal skills and precise pronunciation. I maintain consistent performance across all projects and take pride in being reliable with deadlines, ensuring high-quality results on schedule.
$35 USD in 5 days
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Hello, I’m a native Vietnamese (vi-VN) speaker and I’m interested in Project BV - Vietnamese ↔ English. I can record natural Vietnamese-English code-switching conversations with the required ratio of around 70% Vietnamese and 30% English. I understand the delivery should sound natural and conversational, with no forced or robotic language switching. My details: - Native language: Vietnamese (vi-VN) - English level: conversational/fluent enough for natural code-switching - Age range: [điền tuổi của bạn, ví dụ 18-25 hoặc 25-40] - Gender: [điền Male/Female] - Participation: I confirm I have not participated in this project before - Recording setup: quiet room, phone/headset available - Audio quality: I can record clean WAV audio with no background noise, echo, clipping, or distortion I’m available to start today and can provide a short language verification sample if required. Please send me the recording instructions and group chat details. Thank you.
$30 USD in 1 day
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Hello, I am a native Vietnamese speaker with a strong Business English background, ready to deliver clear, natural conversations that follow your scripts and code‑switching requirements. By working with me, you receive high‑quality audio plus free revisions and re‑records until everything fully meets your standards, while still keeping your project within budget thanks to my competitive bid as a new freelancer. Details: Native language: Vietnamese (vi-VN) English level: Fluent / Business English Gender: Female Age range: 25-34 One-time participation: Confirmed Available for language verification samples and Zoom-based sessions Comfortable coordinating with recording partners in group chat I’d love to participate in Project BV.
$30 USD in 3 days
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Hello, I am a Vietnamese native speaker with clear and natural voice. I can provide both Vietnamese and English voice recordings with good pronunciation and clean audio. I can complete the project quickly and ensure high-quality recordings. Looking forward to working with you! Thank you.
$30 USD in 5 days
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I am a native Vietnamese speaker currently studying Business Administration in France and working in an international environment where English is used daily for academic, professional, and cross-cultural communication. My English proficiency is approximately C1 level, and I am comfortable switching naturally between Vietnamese and English in conversations. In addition to my studies, I have professional experience working in English during my internship, collaborating on communication and digital content projects. This experience has strengthened my communication skills, attention to detail, and ability to follow project guidelines accurately. As a content creator and video editor, I am familiar with media production workflows and understand the importance of audio quality, clear speech, and natural delivery. I am comfortable participating in remote recording sessions, working with a conversation partner, and delivering recordings according to technical requirements. My background as a Vietnamese student living abroad allows me to use both Vietnamese and English naturally in real-life situations, making me a strong candidate for a code-switching speech data collection project. I am reliable, detail-oriented, and fully committed to completing the project according to the provided instructions.
$30 USD in 7 days
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Xin chào, I am Phong, a native Vietnamese (vi-VN) speaker based in Ho Chi Minh City with fluent, professional-level English. I'm highly interested in contributing to Project BV. I fully meet the core language requirements: Vietnamese is my mother tongue and I use English daily in a professional IT and business context, which means my code-switching is natural and context-driven, not forced or scripted-sounding. I fall within the 25-40 age bracket and am male, fitting your demographic targets. On the technical side, I'm comfortable with Zoom for remote recording sessions and have hands-on experience with audio tools including Audacity. I understand the specifications required: stereo WAV, dual sample rates (8kHz/16kHz), and the 70/30 language ratio, and can ensure a quiet, controlled recording environment with appropriate equipment. I'm available for language verification samples at your request and can coordinate flexibly with a paired partner through your group chat structure. Looking forward to contributing to a project that genuinely advances multilingual ASR, this is exactly the kind of meaningful, quality-driven work I'm happy to be part of. Please feel free to reach out to move forward.
$30 USD in 7 days
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Dear Sir/Madam, My name is Kieu, and I am from Vietnam. Vietnamese is my native language, and I also have a strong command of English, with clear pronunciation and good communication skills. Although I am relatively new to voice recording projects, I am a responsible and hardworking person who is eager to learn and improve. I understand the importance of providing accurate and high-quality recordings for AI voice recognition systems, and I will do my best to follow instructions carefully and deliver reliable work. I am committed to completing tasks on time and maintaining a high standard throughout the project. I would be grateful for the opportunity to contribute to your AI training efforts. Thank you for your consideration.
$30 USD in 7 days
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