Translations can break some commands.

[AiroPi]

Describe the bug
When a translations is longer than it's english equivalent, it can break some Discord limitations.
For example, some Embeds fields have small maximum length, and a translation in french, which is longer than in English, can exceed this limit.

To Reproduce
The /sondage command in French raise an error.

Code suggestion
Add an optional argument to _() allowing specify a max_length like :
_("Hello world", _max_length=100)

If a translation is longer than the provided length, the bot log a WARNING and return the stripper string.

[AiroPi]

Solved in #128