automatic data switch to english when sending a campaign

automatic data switch to english when sending a campaign

My account is set up in French.

When I send a campaign, Zoho automatically add text at the beginning and at the end. The problem is that when I look in zoho and send test email the message is in French so that's OK.
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BUT when I send the email as a campaign the message switch to english. 
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Tinteo | Europarc St Victoire, Bat 6, Rte de valbrillant | 13590 Meyreuil



That looks so unprofessionnal !

How can change that ?