
How can I change The form Text input in French?
As you can see in the picture:

Thank you

; Front-end
PLG_GKCONTACT_NAME_PLACEHOLDER="Name"
PLG_GKCONTACT_EMAIL_PLACEHOLDER="e-mail"
PLG_GKCONTACT_TITLE_PLACEHOLDER="Subject"
PLG_GKCONTACT_TEXT_PLACEHOLDER="Your message"
PLG_GKCONTACT_SEND_BTN="Send a message"
PLG_GKCONTACT_RECAPTCHA_ERROR="Invalid reCAPTCHA code"
PLG_GKCONTACT_MESSAGE_SENT_ERROR="An error occured during sending your message: "
PLG_GKCONTACT_MESSAGE_SENT_INFO="Your message has been sent!"
PLG_GKCONTACT_NO_RECIPENT_INFO="The owner of this website didn't specified the recipient of your message."
PLG_GKCONTACT_STANDARD_SUBJECT="Message from contact form on: "
PLG_GKCONTACT_MESSAGE_EMPTY_ERROR="You didn't filled all necessary fields - all fields are required."
PLG_GKCONTACT_NAME_LABEL="Name: "
PLG_GKCONTACT_EMAIL_LABEL="E-mail: "
PLG_GKCONTACT_TEXT_LABEL="Text: "