'Is using echo rather than printf a trouble maker for string translation using .pot file and Poedit?

I was wondering could the use of echo in php code rather than the use of printf() be the cause of a .mo file or in general the reason why the translation files do not work at all?

For Example:

In my php code I have this line of code:
echo __('Twinkle Twinkle little star');

Which has the double underscore identifier __().

When using Poedit, I get my string displayed in the translatable strings column, so that's not an issue.

Sum up:
Could echo cause a problem with the translation even thought Poedit can index and understand that the string is there?

Thanks in advance for your time.

phpwordpresstranslatepoedit


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