Very frequently I see this bug. But it is not always added
@host138 please take the time to make a descriptive bug report, otherwise I take the same time to answer.
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The amount of time spent asking for help is directly related to the amount of time spent putting in effort to answer it. If you want help and / or guidance, then invest as much time as possible in making questions that are detailed and easy to understand. Otherwise, nobody is going to invest their time helping with a question that wasn't even worth the askers time to ask correctly.
And now for the sassy response:
Very frequently I see little effort in making issue reports. But rarely do they get handled.
Closing as it has been over a month since any activity on this occurred and we are trying to figure out what issues are still relevant. If this is still something that you would like to see through to fruition please respond and we can get the ball rolling.
I can verify this issue, having experienced it many times I am able to decipher OP's bug report. Will gather some info but until now I haven't been able to replicate it on demand.
What happens is that when entering text into the editor after switching locales and then saving, "FF" (as in the two capital letters) sometimes appears in the default, or maybe previously used, locale. Not sure if it appears in a random place, or related to the text being edited, but usually it's two Fs next to each other, other times it can be one F at the start of a sentence/phrase and another F at the end.
Very weird, but very annoying too, as can easily go unnoticed.
More info to follow...
Note, that i've only ever seen this happen when using the Rich Text Editor.
Closing as it has been over a month since any activity on this occurred and we are trying to figure out what issues are still relevant. If this is still something that you would like to see through to fruition please respond and we can get the ball rolling.
Just adding to this for the record. Still haven't managed to create a solid test case to replicate the issue, but for what it's worth, it looks like the offending piece of code is in modules\backend\formwidgets\richeditor\assets\js\build-min.js on line 1706...
if(editor.core.hasFocus()){if(!editor.core.isEmpty()){editor.selection.save();editor.$el.find('.fr-marker[data-type="true"]:first').replaceWith('<span class="fr-tmp fr-sm">F</span>');editor.$el.find('.fr-marker[data-type="false"]:last').replaceWith('<span class="fr-tmp fr-em">F</span>');}}
Seems that the "FF" is intentional, and is replaced with 'FROALA-SM' on line 1708, which in turn is then replaced with an empty string on line 1711.
I can confirm that when the "FF" appears, it isn't actually visible in the editor, until you save the file, then re-open it and it's there.
So maybe the editor content is being held in a variable somewhere else, which isn't being updated by the logic on lines 1708 and 1711?
@pavsid is this bug reproducible WITHOUT the Translate Plugin enabled?
@daftspunk could you take a look into this since you're the only one with the actual Froala's source code?
@pavsid is this bug reproducible WITHOUT the Translate Plugin enabled?
99% sure it isn't, because I have only ever noticed it happen after switching between languages in the editor.
I'm also encountering this, here are the steps i follow to solidly reproduce this:

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I'm also encountering this, here are the steps i follow to solidly reproduce this: