Requirements for a language to be used are too soft and do not guarantee quality for websites

Current situation

A language is qualified if all of these happen:

• languages is in config.yaml;
• If there's no content file to translate, then there must be at least one i18n string translated;
• If there's at least one file to translate, then there must be at least one file qualified.

A content file is qualified (and only generated then) if one of these happen:

• There's at least one translation in frontmatter;
• There's no content to translate (i.e. there's nothing in the file other than the frontmatter);
• More than half (0.5) of the content is translated.

However, content files can be generated even in languages that are not qualified (e.g. Russian on 25years-k-o, or Russian and Traditional Chinese on eco-k-o) because such languages do not have any translation for i18n strings. These files are redundant, not used anywhere.

Approach

It was agreed in okular-kde-org!19 (merged) that a banner should be shown for each page that is insufficiently translated, and there's no need to change how a language is qualified.