Strings to translate contain incomplete sentences

[gunchleoc]

Some examples of incomplete sentences to translate that I found in the translation project:

is already taken.
is invalid.

Some languages cannot start a sentence with a noun - this forces grammar errors on the translations (not pretty sentences this will make). What we need here is to use a place holder, so we can translate e.g.:

%s is already taken.
%s is invalid.

as

Tha %s mì-dhligheach.
Tha %s ’ga chleachdadh mu thràth.

[weex]

The good thing about this particular problem is that there aren't that many of this particular form. Also, it may be possible solve without code changes. For example in https://github.com/diaspora/diaspora/blob/develop/app/models/user.rb#L501:

errors.add(:unconfirmed_email, I18n.t("errors.messages.taken")) can stay the same and the english version could change to something like.

"unconfemail@example.com This email address is already taken."

[jhass]

The proper solution is to use the full per key translations instead of the generic scopes. See https://guides.rubyonrails.org/i18n.html#error-message-scopes