Custom Translation Solutions?

Looking for some solutions to our translation needs here, some things I'm trying to accomplish:

• Have a searchable database of existing translation.
• Have some sort of custom dictionaries in InDesign that let the designer know this line of copy has available translation from the database.
• Perhaps be able to one click translate individual text boxes based on existing translation from the database. But not every text box, many materials are bilingual. Sizing is also an issue, as English / Spanish can be designed with different type treatments, but English / French must have the same type treatments.
• Not looking for a service for translation, company has existing translators and isn't willing to move from them.

Our biggest issue currently is redundancy vs. time. When completing translation our design team will often just get the whole document translated, even if many of the lines were translated previously. This has a cost attached to it, and also has us doing translations in waves every season. We get a ton of translation done here, in Spanish and French. Just looking for ways to organize and automate the process.