French is the language of record
Burkina Faso administers itself in French, so a paper written in English is read only once a French text sits beside it. That holds for a private employment letter as much as for a civil record. The English page keeps its place in the bundle, because the French is judged against it rather than sent in its place.
What a sworn translator adds
The certification here is a certified translation carrying a sworn translator's hand. Traducteur assermenté is the French term for a translator who has sworn an oath before a court, and for French official use that standing is what is asked for. The signature, the stamp and the date on the certificate are the parts a clerk actually inspects.
Cost, turnaround and page counts
Each page of the source costs about £25, and you can count your own pages before ordering. Standard turnaround is 2-4 business days. Express work comes back in 24-48 hours. Because pricing follows the sheet, a page thick with stamps and signatures costs no more than a plain one, which keeps a long file predictable.
Protecting a civil record
A birth or marriage certificate lost in transit is replaced only by ordering a new one, so never mail the sheet you hold. A clear scan is all the sworn translator works from. Where a fresh paper copy is wanted too, Reading Register Office at Civic Offices, Bridge Street, Reading RG1 2LU issues certified copies of birth, marriage and death records.