1C = th
1D = el
1E = er
By searching for "tee" you can locate the left table, and by searching "hlr" you can locate the right table.
Finding those stored as a continuous string isn't that uncommon.
The one in Secret of Mana was stored as, following your example, 'theler".
But that one is one of the easiest ones, and its DTE only encodes two characters, no more.
I know also the one in Zelda III and Terranigma (but that's more of a dictionnary) have a succession of words separated by a 00 byte. So does Sword of Mana, and that one is so compression-heavy I have no idea how to build a table for it.
Usually there's a word that's stored uncompressed. For example you have "King:" or "Hyrule" and many heavily used I would bet they are part of a dictionnary and hence are uncompressed. I use a relative search to find those and I usually find the DTE/dictionnary around them AND build the table with the character values.
That said I have a BIG problem with finding the compression (and I read somewhere it's indeed a DTE) used in Front Mission Gun Hazard (AG's translation). It's a challenge I still couldn't solve, and I'd be grateful for any help.