[hk__2]

> So if your preferred language is set to e.g. French, then you shall see France at the top of dropdown.

If it’s French from France, yes. This is the second part of the language code: fr_FR is French from France, fr_BE from Belgium, fr_BF from Burkina Faso and so on.

[melx]

Good point! But what... if it's French Belgian person from France... is this still "French from France", or "French from Belgium" ? The Belgian person lives in France ;-)

Also, you missed other language codes for French: fr_BI, fr_BJ, fr_BL, fr_CA, fr_CD, fr_CF, fr_CG, fr_CH, fr_CI, fr_CM, fr_DJ, fr_DZ, fr_GA, fr_GF, fr_GN, fr_GP, fr_GQ, fr_HT, fr_KM, fr_LU, fr_MA, fr_MC, fr_MF, fr_MG, fr_ML, fr_MQ, fr_MR, fr_MU, fr_NC, fr_NE, fr_PF, fr_PM, fr_RE, fr_RW, fr_SC, fr_SN, fr_SY, fr_TD, fr_TG, fr_TN, fr_VU, fr_WF, fr_YT.

[nicbou]

As an official policy, I do not recognise the existence of Belgium.

However I am Canadian and I speak French. It will recognise fr-CA as "Canada".

[hk__2]

> But what... if it's French Belgian person from France... is this still "French from France", or "French from Belgium" ? The Belgian person lives in France ;-)

This is accessory; the goal is to suggest relevant options for someone based on the language they configured their browser with.

> Also, you missed other language codes for French: […]

These are combinations of a language code (fr) and a region code; the list is not standardized and could theorically be extended to all the regions with an ISO code. What’s interesting here is the region code, not the language.