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Server: Apache
System: Linux distracted-cartwright 5.4.0-90-generic #101-Ubuntu SMP Fri Oct 15 20:00:55 UTC 2021 x86_64
User: hvmbertogarza.com_s2ctmc9wn9 (10011)
PHP: 8.3.30
Disabled: opcache_get_status
$ pwd: /var/www/vhosts/hvmbertogarza.com/httpdocs/wp-content/plugins/ajax-search-pro/languages/
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File: /var/www/vhosts/hvmbertogarza.com/httpdocs/wp-content/plugins/ajax-search-pro/languages/readme.txt
Official info about translation: http://codex.wordpress.org/Translating_WordPress

Example, translating to French:
Use the ajax-search-pro.pot file and save new copy as ajax-search-pro-fr_FR.po for Spanish.
And then use translating program to translate it to French language, for example PoEdit: https://poedit.net/
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