Just wondering here... but have you translated the words which appear in teaser trailer yet? https://forums.elementalgame.com/329963
There appears to be many words floating in the background...
Also, the letter X appears in the trailer multiple times, in case you still need that letter's symbol and is VERY apparent what it's symbol is.
Edit: after reverse engineering your translations compared to the symbols on the pages you translated, the words appearing the in background are pretty much objects that fall under the catagories in the main text (explore, expand, exploit, exterminate, as well as the small paragraphs which are shown in english)
For example, catapult and foot soldier under 'exterminate', castle under 'expand' and white ruins, (indecipherable) caverns under 'explore.' Also, some of them repeat.
I would guess the letter to faint or small to read would also read out to be items relating to the titles... However, the very large text (for the 4X titles) makes for very good copy and paste to get a much more detailed look at the letter than the artwork shots provide.