I'm getting started with Weaviate, I visited the Weaviate docs, but I couldn't find a resource describing which languages are currently supported.
Programming languages Weaviate itself is written in Go, but most likely this has no influence on how you interact with it. Weaviate can be used language-agnostic using it's GraphQL and/or REST API. Additionally there are native language clients for Python, Go, Java and Javascript/Node. Other clients may be added in the future and if your favorite language is missing, you can contribute a client yourself.
Human languages / NLP Weaviate Core (the pure database) is language-agnostic, it only knows objects and vectors. However, you might be interacting with Weaviate with one of our modules and they each support different languages, outlined below.
Text2vec-transformers / multi2vec-clip You can plug in any transformers model, public or private, so there is no limitation to languages. The out-of-the-box models are typically either English or Multi-lingual
QnA-transformers Similarly, the QnA module supports any custom module, so if you can find one in the language of your choice you can plug it in or train one yourself. The out-of-the-box modules currently all run in English.
Text2vec-contextionary The contextionary models cannot be replaced with custom models, therefore you are limited to the out-of-the-box languages which currently include English, Dutch, German, Czech, Italian.
Text-Spellcheck The spell-check module currently supports English, Dutch, and German, whereas also see https://ukatie.com/#/read-answer?domain-id=ceb2d2f2-2c1d-49be-a751-eed4be19e021&uuid=511aa289-361f-4b39-bbd0-84d286645f20