Hello Abraham,

you can find the French package at https://www.j2commerce.com/extensions/translations/translations-fr-fr.

We apologize, there was an update last week and it changed our package names. We are working on a fix.

As far as the language key to override, I believe the key you want to replace is PAYMENT_STRIPE.

The only other language key that has Stripe as value would be PLG_J2STORE_PAYMENT_STRIPE.

Abraham,

the image is usually meant for logos of a bank or a banking service, usually a small size image.

You could probably fix this with CSS or a template override.

If you go with an override, the file to override is defualt_shipping_payment.php from checkout.

Please don't ask unrelated questions in one single ticket, it is difficult to keep track of all your requests.

So please open a different ticket for Easy Checkout shipping issues.

For the language overrides, you need to create one override of the same key for every language. So the override you created for English also needs to be created for French. 

Easy Checkout has not yet been translated into French. You will have to create language overrides for the missing keys in the meantime.
The keys for shipping/billing are:

EASYCHECKOUT_ADD_SHIPPING_ADDRESS
EASYCHECKOUT_ADD_BILLING_ADDRESS

Hello,

I solved the problem with the override to see 'Major Credit Cards' and it's French translation.

In the Stripe plugin, you have set 'Payment option title' to 'Major Credit Cards'.

In order for the Stripe title to be visible in different languages, you cannot set that value to one language. You have to set it to a language key that you can later override.

I have set 'Payment option title' to PAYMENT_STRIPE so that now it shows properly in English and French.