All translations

%t is the title of the translation.
%r will be a quotation of the text to be translated.
%t and %r must be kept unchanged in the translation.

%a and %b must be kept unchanged, they are names of languages

For example, you have a french lesson commented in english :
« "Bonjour" means "Hello" »
If you want to translate the lesson into italian it will be :
« "Bonjour" significa "Buongiorno" »

In this example the french language is the taught language and the english and spanish languages are the languages used to comment the lesson. "Bonjour" is kept untranslated.

Illustration in the sense of "picture".

The verb. eg: To record a sound with your microphone