Welsh Language Specialist - Freelance AI Trainer Project

Lever, Inc.; Portugal; Remote; EUR 9,800 - 80,000; Full time

Benefits offered by this job

Fully remote freelance work

Flexible contract-based opportunity

Exposure to cutting-edge AI tools and评

Job summary

Lever, Inc. is seeking a Welsh Language Specialist - Freelance AI Trainer Project based in Portugal. You will annotate AI Welsh content, assess grammar and style, and provide expert feedback to improve model outputs.

Work remotely in a flexible freelance role, collaborating with language teams to refine prompts, guidelines, and evaluation methods for Welsh-language AI tools used worldwide.

Qualifications

• Fluent or native-level proficiency in Welsh with modern usage.
• Experience in translation, linguistics, language teaching, editing, or content creation.
• Strong understanding of Welsh grammar, syntax, semantics, vocabulary, style, and culture.
• Excellent written communication and ability to explain linguistic decisions.
• Attention to detail and ability to identify subtle language errors.
• Experience with linguistic annotation, AI training, data labeling, or model testing is advantageous.
• Ability to work independently in a remote freelance environment.

Responsibilities

• Review and annotate Welsh-language content used for AI training and evaluation.
• Assess AI-generated Welsh outputs for grammar, fluency, meaning, style.
• Identify linguistic, contextual, and cultural issues and provide actionable feedback.
• Analyze recurring error patterns to improve model performance.
• Evaluate whether generated content reflects Welsh linguistic and cultural context.
• Contribute feedback to prompts, evaluation methodologies, and language guidelines.
• Apply consistent annotation and quality standards across tasks.
• Collaborate remotely with project teams and other language specialists.
• Use professional judgment when reviewing nuanced Welsh content.

Skills

Welsh language proficiency

Linguistics background

Translation/editing experience

Remote freelance experience

Job description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Welsh Language Specialist - Freelance AI Trainer Project based in Portugal.

This freelance opportunity is designed for an experienced Welsh language professional who wants to contribute directly to the development of next-generation AI systems.

You will apply your linguistic expertise to evaluate, annotate, and improve AI-generated Welsh content.

Your work will help models produce language that is more accurate, natural, culturally appropriate, and contextually meaningful.

You will assess grammar, syntax, semantics, style, fluency, and cultural nuance across a variety of AI outputs.

The role combines language expertise with emerging AI technologies in a flexible, remote environment.

You will also help identify recurring model errors and improve prompts, evaluation approaches, and linguistic guidelines.

This is an opportunity to use your Welsh expertise to support AI tools serving Welsh-speaking communities worldwide.

Accountabilities

• Review and annotate Welsh-language content used for AI training and evaluation.

• Assess AI-generated Welsh outputs for grammatical accuracy, fluency, meaning, style, and natural language usage.

• Identify linguistic, contextual, and cultural issues and provide precise, actionable feedback.

• Analyze and document recurring error patterns to help improve model performance.

• Evaluate whether generated content appropriately reflects Welsh linguistic and cultural context.

• Contribute expert feedback to the development and refinement of prompts, evaluation methodologies, and language guidelines.

• Apply consistent annotation and quality standards across assigned tasks.

• Collaborate remotely with project teams and other language specialists to resolve ambiguous linguistic cases and improve evaluation quality.

• Use professional judgment and attention to detail when reviewing nuanced or context-dependent Welsh content.

Requirements

• Fluent or native-level proficiency in Welsh, with a strong understanding of modern Welsh usage.

• Demonstrated professional experience in one or more relevant areas, such as translation, linguistics, language teaching, editing, proofreading, content creation, or language research.

• Strong understanding of Welsh grammar, syntax, semantics, vocabulary, style, and cultural context.

• Excellent written communication skills and the ability to clearly explain linguistic decisions.

• Strong attention to detail and the ability to identify subtle language errors and inconsistencies.

• Ability to evaluate language objectively and provide structured, constructive feedback.

• Experience with linguistic annotation, AI training, data labeling, language evaluation, or model testing is advantageous.

• Experience in training, coaching, education, or other roles requiring clear explanation of language concepts is a plus.

• Comfortable working independently in a remote freelance environment and managing assigned work to required quality standards.

• Reliable access to a secure computer and stable internet connection.

• Ability to work with digital tools and AI-generated content as part of a structured evaluation workflow.

Benefits

• Fully remote freelance working arrangement.

• Flexible contract-based opportunity suitable for experienced language professionals.

• Opportunity to contribute directly to the development and improvement of next-generation AI systems.

• Exposure to cutting-edge AI tools and language-model evaluation workflows.

• Work that can help improve Welsh-language experiences in areas such as education, accessibility, communication, and technology.

• Compensation ranging from $8 to $65 per hour, with the final rate determined based on experience, expertise, and geographic location.

• Opportunity to apply specialist Welsh linguistic and cultural knowledge to meaningful AI development projects.

• No company-sponsored health insurance or paid time off, as this is a freelance contractor position.

• Contractors are responsible for providing their own secure computer and stable internet connection.