Codebases written by native English speakers are almost exclusively ASCII, but codebases written by speakers of languages other than English frequently have non-ASCII content, even if only in the comments, but languages which support it often wind up with non-ASCII identifiers, too.<p>I do not believe that emoji like crosses and ticks are particularly common at all, for any language, but LLMs seem to have picked up heavy use of them from somewhere and inserted them into code (and everything else) they generate.<p>LLM training sets will very likely include the massive corpos of non-English open source code from sites like Gitee, but would be unlikely to generate responses heavily influenced by them unless you've done specific things to make that happen - prompt in Chinese, try to make use of a library only available with Chinese source and/or documentation, perhaps. I've not seen it happen, but I am a light user of LLMs.