Add more translations

[andreondra]

Now, as the multi-language functionality is implemented, more translations can be created. If you are interesting in creating translation for any language, refer to the CONTRIBUTING.md file in the repo's root.

[andreondra]

Hi @mathieupotier, if you are interested in adding a translation for sensor names etc., feel free to create a translation file according to the guide.

[mathieupotier]

I'll do some tonight 😉

[mathieupotier]

#63

Adding new language could be easily don,e with google translate on first batch, and we just have to fine tune later ^_^
But it's surprisingly accurate on many lines ... 😉

[andreondra]

Good job, I'll have a look!