more languages support

[miztizm]

Please could you add some popular languages for the initial prompts, so that the things like "make text longer" work with the native language message, because it always writes in English. Thanks! And your app rocks!

[smackgg]

@warshell Yes, actually it's not very complicated to modify. We can just slightly adjust the prompt based on the language set by the user. I've been busy lately and may not have time to do it myself, so if you have the energy, feel free to submit a pull request.