It's probably easily doable as those texts are in fact available online.  One would just have to compile them in a single database and line them up, applying the proper software to do so.  I could probably pull it off without too much difficulty, as I'm both a software developer and have strong knowledge of Greek, Latin, and even a passing knowledge of Biblical Hebrew.  There's a bit of a challenge with the Hebrew in that Hebrew reads from right to left, but it's still workable if the reader knows that.

Perhaps over my Christmas break, I'll see if I can get the structure set up ... database, website to display it, and perhaps a way to start entering text.

Here's a wonderful resource that accomplishes a lot of what you're looking for:

www.stepbible.org

You can choose interlinear or side by side texts. It has a whole host of manuscripts. There's at least 5 latin vulgates a multitude of greek manuscripts to choose from, septuagints, hebrew syriac etc. At a glance I only saw a 1752 douay-rheims. Some of the greek manuscripts are tagged so when you click on a word it'll provide a brief definition and and parse it as well depending on which dictionary is active/available.

It seems modular so someone could add other douay-rheims texts or catholic commentaries like A Lapide.

There's also a desktop app. I'm not the best with technology so it probably does a whole bunch of other neat stuff as well haha.

There are other protestant Bible websites / apps that do similar things but this is the best one I've yet found. God save those poor protestants.

Hopefully this will make for some joyful scripture study during the Christmas season.

Please pray for me a sinner!

Here's a wonderful resource that accomplishes a lot of what you're looking for:

www.stepbible.org

You can choose interlinear or side by side texts. It has a whole host of manuscripts. There's at least 5 latin vulgates a multitude of greek manuscripts to choose from, septuagints, hebrew syriac etc. At a glance I only saw a 1752 douay-rheims. Some of the greek manuscripts are tagged so when you click on a word it'll provide a brief definition and and parse it as well depending on which dictionary is active/available.

It seems modular so someone could add other douay-rheims texts or catholic commentaries like A Lapide.

There's also a desktop app. I'm not the best with technology so it probably does a whole bunch of other neat stuff as well haha.

There are other protestant Bible websites / apps that do similar things but this is the best one I've yet found. God save those poor protestants.

Hopefully this will make for some joyful scripture study during the Christmas season.

Please pray for me a sinner!

I can't get the quasi-interlinear stuff woking like I thought it was in the beginning.

I know someone fluent in Aramaic, ancient Syriac and Hebrew. PM me if interested