To import the file into WordPress, I recommend Really Simple CSV Importer. It still works well despite not being updated recently.
https://www.ads-software.com/plugins/really-simple-csv-importer/
But first, you will need to edit that file. If you are on a PC, I recommend the free version of Ron’s Editor.
https://www.ronsplace.eu/Products/RonsEditor
Tip: Don’t edit the original file. Always work on a copy.
The first line needs to be a header record that identifies the fields. Here’s an example of a header record and one testimonial:
post_type,post_status,post_date,post_title,post_content,client_name,tax_wpm-testimonial-category
wpm-testimonial,publish,2007-08-31,"The Backstreet DJ's were great.","They kept the party jumping and everyone had a good time. The music was a hit with the guests.",Roma Sison,backstreet-djs
The minimum required fields: post_type, post_status, post_date, post_content.
client_name is a custom field.
tax_wpm-testimonial-category is the testimonial category slug (not the name). That’s optional.
I think this would be your current header record:
client_name,post_title,post_id,post_content,post_date
You will need to delete the post_id field in each record.
You will need to add post_type and post_status for each record like the sample above.
It looks like line breaks and/or list items were stripped during export. For example,
Accueil très chaleureuxRestaurant décoré avec go?tRepas copieux, raffinéUne soirée très réussie.
should have at least a space between chaleureux and Restaurant. Reinstating paragraphs could be done in the file by wrapping each segment in <p>
,</p>
tags but it’s probably easier to do that in the WordPress post editor where you can just hit Enter to create paragraphs.
When you’re ready to import, make a backup first. If you need it, I recommend BackupGuard for this sort of thing. It allows you to backup the database only which is all you would need to restore if something goes wrong.
https://www.ads-software.com/plugins/backup/
Import the file. Check the testimonials. If something did not import properly, restore the database, fix the import file, try again.