What you get when a non-native speaker tries to use a language they're not fluent in, and makes mistakes in the process. That country is usually Japan in Danbooru's case, but other international screwups are possible and encountered. These mistakes can include both misspellings (such as the very common error of mixing up "L" and "R") and grammatical errors. Sometimes the speaker also is too young to speak their native language properly.
To find specific languages containing this, search for the language plus ranguage. For example:
