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Official Languages: French

French is the main language used in daily life. English is not widely spoken outside some tourism, hospitality, and space center contexts, so basic French is very useful.

Mobile Network: Mobile coverage is generally good in Cayenne, Kourou, and along main coastal areas, but it can become weak or unavailable in inland rainforest zones, river areas, and smaller remote communities.

Roaming/SIM/eSIM: If your home plan includes France or EU overseas roaming, check carefully whether French Guiana is included, because pricing can differ by operator. Roaming is the easiest option for short stays but may be expensive. A local SIM is typically the best value for longer stays if your phone is unlocked. An eSIM can be convenient before arrival, but availability and pricing vary, and local plans may still offer better value for heavier use. Do not expect reliable mobile data in remote interior areas.

Cards are commonly accepted in Cayenne, Kourou, larger hotels, supermarkets, and many restaurants. Cash is still useful for small shops, markets, taxis, river transport, and more remote areas, so do not rely on cards everywhere.

Service is often included in restaurant prices under French rules, so tipping is not mandatory. Leaving small change or rounding up is appreciated for good service. For taxis, rounding up is common. For guides, tips are discretionary and depend on service quality and trip length.

Plug Type: Type C and Type E

Voltage: 230 V, 50 Hz

Adapter: Visitors from countries using 230 V Type C or E plugs commonly do not need a voltage converter, but travelers from countries using different plug types will usually need an adapter. Travelers from 110 V systems should check device compatibility.