As a convention, characters like ":" or similar will be put outside of the string to translate:
Recommended: (easier for the human translatorthat will do the translation to other languages)
| Code Block |
|---|
[_ "Dear Sir"]: |
Not recommended:
| Code Block |
|---|
[_ "Dear Sir:"] |
(Note that the colon must be joined to the close bracket, with no intermediate spaces)