i18n data, roll button and macro variables

How do you translate the text of a macro variable in a roll button value ? For example :  <button type="roll" name="RollStrength" data-i18n-title="strength-roll" title="Strength roll" value="&{template:tmplt} {{character=@{character_name}}} {{title=^{strength}}} {{roll=[[2d6+@{strength}+ ?{Bonus|0} ]]}}" ></button> How do I set the i18n data for the " Bonus " text/macro variable to be translated?

I'm not sure, but you could replace "Bonus" with a translated Attribute ^{bonus}.

Thanks Silvyre but I tried that already and its doesn't work : the input message shows "^{bonus" as text (without the closing brace).