Le Marquis, one of the French translators of the mod, would be interested in translating the new content once you think the content is table. Unfortunately, the new dialogs do not have a tra file right now. If you're interested in opening the new content to translation, it's actually easy to convert the dialogs and transfer texts to tra files with a simple WeiDU command.
Provided you have the mod in the game directory, and you also have weidu.exe in the game directory, you just have to type
weidu --nogame --traify Chloe\D\RChloeToB.d --out RChloeToB --traify-comment
weidu --nogame --traify Chloe\D\SoANew.d --out SoANew --traify-comment
to get a new d file and a tra file in the game directory for both dialogs.
--traify-comment tells WeiDU to keep the texts withing comments in the converted d files.
Then you could just replace the existing d files in Chloe\D with the new d files and move the tra files in Chloe/Language/English.
I also have a comment about the parameters used for HANDLE_CHARSETS. I noticed you used default_language. However, as the tp2 is written now, default_language will not provide any help to install the mod because the way the LANGUAGE statements are written, English is not the default language when installing. It's only the first one in the list.
The purpose of default_language is to tell WeiDU to convert to UTF-8 tra files in both the language selected by the player and the tra files of the default language. But this is useful only if your LANGUAGE statements are written in such a way that English texts will be used when installing in case a text is missing in the selected language.
To do that, you need to write the LANGUAGE statements like this:
LANGUAGE ~Francais (par Miry Wolfwood, Le Marquis et Magiere)~
This tells WeiDU to load texts from English/setup.tra, then load French/setup.tra. In practise French texts will overwrite English texts, unless a French text is not defined in the French tra file.
The purpose of default_language in HANDLE_CHARSETS is to tell WeiDU that, when the player selects French when installing, it should convert French tra files to UTF-8, and English files too, in order to ensure that any text that could be used when installing is indeed using UTF-8 encoding.
Using default_language and adding ~Chloe/Language/English/setup.tra~ to all languages except English will not be enough to allow installation of the mod in languages other English if you traify the new dialogs.
In order to get the "default language" behaviour for the dialogs, I believe you could compile them using this statement (for SoANew):
COMPILE SoANew.d USING ~Chloe/Language/English/SoANew.tra~ ~Chloe/Language/%LANGUAGE%/SoANew.tra~
Please tell us if you're interested in a translation of the new content.
Thank you for bringing back this mod.