I talk to it in non-English. But have rules to have everything in code and documentation in english. Only speaking with me should use my native language. Why would that be a problem?
When you say Claude learned it. That's in the current context window it is able to do that, right? Or is there a more permanent way to make it learn something?
I'm surprised that Opus 4.5 is better than Opus 4.6 and Sonnet 4.6 is even better than Opus 4.5 (and 4.6). Shouldn't Opus 4.6 be the best of the Claude models?