Thank you for your response, but it didn’t help.
In stripe_official.php, I changed 'Pay online' to 'Stripe', so from now on, I'll be working with this name instead of 'Pay online'.
In fr.php, I tried various variations (with the help of ChatGPT 😆) – I even tried adding the MD5 hash (for 'Stripe', it's ce7566d1d08cc094b74cf283cf9c56a5), for example:
$_MODULE['<{stripe_official}prestashop>stripe_checkout_ce7566d1d08cc094b74cf283cf9c56a5'] = 'Payer en ligne';
or:
$_MODULE['<{stripe_official}prestashop>ce7566d1d08cc094b74cf283cf9c56a5'] = 'Payer en ligne';
But none of this worked.
In the translations table in the database, I also tried searching for translations. Some of the translations I did via the BO are there, and I wanted to try adding it directly into the DB. However, I don’t know what to put in the domain column. The few translations related to the Stripe module that are in the DB have domains like ModulesStripeofficialOrderconfirmation, ModulesStripeofficialPaymentinforedirect, ModulesStripeofficialHandlenextaction, etc.