Include languages' translated names in the switcher

[AA-Turner]

An alternative to #244 (closes #244, #238 if merged).

I think it is cleaner to use a new attribute for the local/translated/native name for each language, rather than overloading the name field. I agree with @encukou that the English name should come first, and that we should not de-emphasise the other name by using brackets for it.

cc @StanFromIreland @rffontenelle @m-aciek as I can't request you as reviewers.

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[StanFromIreland]

@JulienPalard @oonid @alessandrocucci @cocoatomo @flowdas @zhsj @mattwang44 @egeakman @raulcd

I cannot request reviews. Pining coordianators to settle capitalization.

[StanFromIreland]

Is it overloading the name field? In my opinion this is a little over complicated for static text that can be pre-stored as a string. It has no effect on the end user and is easier for us as the logic is simpler while still being well below 80 chars.

[AA-Turner]

settle capitalization

I'm unsure what you mean here? Language names are proper nouns so must be capitalised. Did you ping people just to check spelling? Just for the future, it may be better to check these questions before pinging lots of people.

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[encukou]

Treating language names as proper names is a weird thing that English does. See here for the discussion: #244 (comment)

[StanFromIreland]

@AA-Turner Apologies, I assumed you had read the long exchange in my PR where this question had been asked. Petr has linked it.

[AA-Turner]

Thanks for linking to the thread!

This table from Wikipedia suggests the following translations for languages.

Name	Translated name
German	Deutsch
Spanish	español
French	français
Indonesian	bahasa Indonesia
Italian	italiano; lingua italiana
Polish	Język polski
Turkish	Türkçe
Ukrainian	Українська мова; Українська

Other sources:

• Spanish (no capitalisation): [ref]
• French (no capitalisation): [ref]
• Indonesian (capitalisation): [ref] (unclear if we should use "Indonesia" or "bahasa Indonesia", though -- the latter seems to refer specifically to standard Indonesian.
• Italian (no capitalisation): [ref]
• Polish (no capitalisation per @m-aciek): unclear whether to use the "Język" prefix.
• Turkish (capitalisation): [ref]
• Ukrainian (no capitalisation): [ref] (this disagrees with the Wikipedia list)

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[mattwang44]

Here are the common translations of Chinese in other language switches.

[raulcd]

From the Spanish translation point of view.