Fixes reported at Transifex, mainly

It includes fixes for:
• Facts (distances, years).
• Texts that had references out of context, having been extracted from larger texts without previous editing.
• Tenses in history texts.
• British spellings: defence → defense, neighbour → neighbor.
• Fixes of string formatting: %{foobar}s → %(foobar)s.
• De-internationalization of debug/error messages in ‘binaries/data/mods/public/gui/common/functions_utility_music.js’.
• Addition of translation context to some strings.
• Unnecessary line breaks at the end of translatable strings.
• Cypriad → Cypriot