Current behavior:
It is not possible to set a max length limit for source text to be submitted via the Submitter Portal for translation.

Requested behavior:
It is possible to set a max length limit for source text to be submitted via the Submitter Portal for translation.

Use case:
Some users would like to limit their clients to submit content through the SP for short tasks only. This would allow them to set a maximum character/word count for content to be submitted for translation.