The new thank you email got approved. Content is here: https://meta.wikimedia.org/wiki/Fundraising/Translation/Thank_you_email_2018-10-01
There's some fiddly stuff with [isRecurring] tags, we'll have to be careful when pushing out other translations to make sure they are done correctly. I also added the "RecurringRestarted" and "UnrecordedCharge" paragraphs just in case we need them again.
The preferred subject line is "Your $5 gift = free knowledge for billions" with $5 replaced by the donor's amount. If that's not possible (I think it's not in the subject line?) then it may just have to be "Your gift = free knowledge for billions".