Don't add encondings in i18n functions

This code was unnecessary as normalise_locale adds the default encoding automatically. As normalise_locale doesn't work with locale names like en.UTF-8 (produced by this code fragments), it's better to just use en as locale name. normalise_locale would change en to en_US.UTF-8 then.

added type::bug label

mentioned in merge request AlekSIS/official/AlekSIS-App-Chronos!85 (merged)

@nik Please review.

merged

mentioned in commit 84fc7530