AI Learns Portuguese Faster Using Spanish: The Power of Transfer Learning

Deepgram engineers leveraged linguistic similarities to rapidly develop a high-accuracy Portuguese speech model.

Deepgram successfully used transfer learning to create an accurate Portuguese AI model by building on an existing Spanish model. This approach highlights how similar languages can accelerate AI development, making advanced AI more accessible.

Sarah Kline

By Sarah Kline

February 13, 2026

3 min read

AI Learns Portuguese Faster Using Spanish: The Power of Transfer Learning

Key Facts

  • Deepgram used transfer learning to develop a high-accuracy Portuguese AI model.
  • The Portuguese model was built upon an existing Spanish AI model.
  • Transfer learning adapts a model trained on one task to a different, related task.
  • Spanish and Portuguese were chosen due to their significant linguistic similarities.
  • This method improves AI development efficiency and accuracy for new languages.

Why You Care

Ever wonder how AI can learn new languages so quickly? What if an AI could understand your Portuguese podcast or Spanish customer calls with accuracy, almost instantly? This isn’t science fiction anymore. Deepgram’s recent work shows how existing AI knowledge in one language can dramatically speed up learning another, directly impacting your ability to use AI tools.

What Actually Happened

Deepgram’s Senior NLP Engineer, Duygu Altinok, revealed a significant advancement in natural language processing (NLP). The company successfully applied transfer learning to develop a high-accuracy Portuguese speech model. This model was built upon their pre-existing Spanish model, according to the announcement. Transfer learning involves taking an AI model trained on one task and adapting it for a different, but related, task by modifying its training data. This method is gaining traction in machine learning, especially for language-related applications, as detailed in the blog post. The team focused on the inherent similarities between Spanish and Portuguese to make this leap.

Why This Matters to You

This creation means faster, more efficient AI model creation for new languages. Imagine you’re launching a new service in a different country. An AI model for their language could be ready much quicker. This approach reduces the time and resources typically needed for training AI from scratch. The research shows that this method leverages existing linguistic relationships.

Here’s how this benefits AI creation:

  1. Accelerated creation: New language models can be deployed faster.
  2. Resource Efficiency: Less data and computational power are needed.
  3. Improved Accuracy: Models benefit from pre-trained knowledge, leading to better performance.
  4. Broader Accessibility: More languages can receive AI support.

For example, think of a customer service chatbot. If it already understands Spanish, adapting it for Portuguese becomes much simpler and faster. This saves companies time and money, and it means you get better service. “Transfer learning is one of the hottest topics of natural language processing—and, indeed, machine learning in general—in recent years,” Altinok stated, highlighting its growing importance. How might this ability to quickly adapt AI to new languages change your daily interactions with system?

The Surprising Finding

The most intriguing aspect of this work is how geographical and linguistic proximity directly translates into AI efficiency. It turns out that languages that are “neighbors on the map” also share underlying “vectors” or representations in AI models. This challenges the assumption that each language requires an entirely independent and massive training effort. The study finds that the deep similarities between Spanish and Portuguese made them an ideal pair for this transfer learning experiment. This means that the AI’s understanding of word relationships and grammar in Spanish provided a strong foundation for learning Portuguese. The technical report explains that this intuitive connection between languages significantly streamlines the AI training process. It truly highlights the power of leveraging existing knowledge.

What Happens Next

This success with Spanish and Portuguese sets a precedent for future AI language creation. We can expect to see similar transfer learning applications for other closely related languages within the next 12-18 months. For instance, an AI model trained on French might quickly adapt to Italian or Romanian. This will accelerate the global deployment of AI-powered tools like voice assistants and transcription services. If you’re building an AI product, consider how existing models for related languages could jumpstart your efforts. The industry implications are vast, potentially lowering barriers to entry for AI in diverse linguistic markets. As Altinok mentioned, “we’ll discuss some of our specific logic here, including the intuition of picking Spanish for helping Portuguese model training and the similarities between these languages on many levels.”

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