Multilingual AI Services

Build Language-aware AI that resonates globally

At Qualitest, we specialize in building and training Large Language Models (LLMs) with powerful multilingual capabilities, enabling organizations to understand, process, and generate content across more than 100 languages with cultural sensitivity and linguistic precision.

Whether you’re localizing customer experiences or scaling AI products across regions, our multilingual AI services ensure your models speak the world’s languages, intelligently and inclusively.

Our Capabilities

Multilingual data collection & curation

We collect, aggregate, and curate linguistically rich and culturally representative data from over 100 languages and dialects:

  • High-quality corpora across high-resource and low-resource languages
  • Bias-filtering and cultural adaptation for training-safe datasets
  • Open-source and proprietary data curation strategies

Language-aware preprocessing

Our preprocessing pipelines are built to preserve the unique linguistic traits of every language:

  • Advanced tokenization methods (e.g., SentencePiece, byte-level BPE)
  • Language-specific normalization, morphological handling, and script compatibility
  • Cross-lingual dataset deduplication for cleaner training data

Cross-lingual model architectures

From training multilingual LLMs from scratch to fine-tuning existing models, we deliver robust architecture for:

  • Multilingual understanding and generation
  • Seamless cross-lingual knowledge transfer
  • Real-time inference across global use cases

Evaluation & benchmarking

We ensure your multilingual models perform at the highest standards:

  • Standardized and custom multilingual test suites
  • Human-in-the-loop evaluations for fluency, tone, and cultural fit
  • Robust testing for bias, toxicity, and fairness across languages

Language expansion & transfer learning

Accelerate the inclusion of new or underrepresented languages through:

  • Cross-lingual transfer learning and translation-based augmentation
  • Synthetic data generation for low-resource language bootstrapping
  • Continual learning without catastrophic forgetting

Global Expertise. Local Fluency.

8200+ AI Data Experts

19 Global Delivery Centers

100 Languages and Dialects

60+ Industry Domains

Global Hubs & Highlights

MEXICO

Google VOVO certified, HIPAA and ISO 27001 compliant, ~26 nationalities with bilingual/trilingual skills

INDIA

Comprehensive support for all Indian languages

LISBON & MADAGASCAR

Native support for French and Nordic/European languages

AUSTIN & BANGALORE

Multilingual AI R&D centers

MADAGASCAR

9-locale language support

Our team includes 600+ linguists and language specialists across continents, enabling culturally accurate, high-fidelity AI training and validation at scale.

Language Services at Scale

We cover hundreds of language pairs with expert-led processes:

Human-validated machine translation

Machine-translated content reviewed by linguistic experts for accuracy, tone, and local nuance, combining efficiency with quality.

 

Specialized language services

  • Localization: Tailoring content to fit regional language, regulation, and culture
  • Transcreation: Adapting messaging while preserving tone, context, and brand intent
  • Transliteration: Script conversion while maintaining phonetic identity

Fully human translation

When precision matters, our experienced translators manage the entire translation process, ideal for high-stakes or nuanced content.

 

Supported languages

English, Spanish, Mandarin, French, German, Portuguese, Russian, Arabic, Japanese, Korean, Italian, Dutch, Vietnamese, Hindi, Indonesian, Polish, Thai, Romanian, Swedish, Czech and many more

Why Qualitest?

We’ve delivered 15+ million hours of AI data services, combining cutting-edge multilingual AI capabilities with deep linguistic and cultural understanding. Whether you’re expanding into global markets or building inclusive AI systems, we help you deploy AI that truly speaks your users’ language.

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