Panama reads Spanish
Panamanian offices work in Spanish, and much of what reaches them from Birmingham is commercial rather than personal: a power of attorney, a company resolution, an extract from a register, a signed agreement. A certified translation into Spanish in Birmingham puts that material into a form a Panamanian reader can act on.
Your English documents are not marked or retained. The Spanish is produced from scans and delivered as a separate set, so the executed originals stay wherever they are properly kept, which on corporate matters is usually with a solicitor rather than at home.
What stays exactly as printed
Identifiers do not move. Company names, registration numbers, court names and registry names are reproduced as printed, because their whole function is to point at a record somebody else holds. Translating one turns a precise reference into a description, and a description cannot be looked up.
Everything around them is proper Spanish. So a clause reads naturally to a Spanish speaker while still naming the British entity in the form the British register uses. An official Spanish translation in Birmingham that gets this balance wrong is either unreadable or untraceable, and both fail the reader.
Structure, price and timing
Structure survives intact. Clause numbers, schedule letters, recital ordering and signature blocks all appear where they appear in the English, because a certified translation for Panama is going to be read against the original page by page rather than on its own.
Pricing is per side at roughly £25 a page and delivery is 2–3 business days, or 24 hours in express. Where a personal civil record forms part of a corporate file, Birmingham Register Office on Holliday Street issues fresh certified copies of births, marriages and deaths for an official fee.