Get OpenTwebst here. Documentation here.
There are many tutorials. Despite what some of the blurbs say, it works with IE 11. It has a macro recorder whose possibilities I have not yet fully explored.
I haven't seen any references on the web to others using AHK with OpenTwebst, thus this post.
For the code below, you must use the included file "trans2.xls" and you must edit the path to the file so the script can find it.
Also included is a tweaked, easy-to-view copy of IWB2Learner with zoom capability and some features restored, in case you find it useful. (I got most of the IWB2 Learner script here somewhere, but cannot find where anymore. All credit goes to the author, not me.)
EDIT: Commented out one unneeded line with a right-click action. It doesn't hurt, but adds nothing, so it's gone now. Still in archive code, though.