The word 'professionnel' in French is used to describe someone who is skilled or experienced in a particular field or occupation. It can also be used to describe a job or occupation itself, as in 'un emploi professionnel'. The term is often used to distinguish between amateur and professional levels of skill or experience. For example, a 'footballeur professionnel' is a professional soccer player, while a 'footballeur amateur' is a player who does not receive payment for their participation in the sport.

The French word 'pain d'épices' directly translates into 'spice bread', but it's used to indicate 'gingerbread' in English. This term is often used to describe a variety of baked goods that are flavored with ginger and a variety of other spices. It's associated with the holiday season in both cultures.

The French word for 'leader' is 'chef'. It is used to refer to someone who leads a group of people or a team. It is also used to describe the person who has the highest authority in an organization or a group. This usage is exactly like how we use 'leader' in English.

The phrase 'Il y a une annonce gratuite' is used in French to indicate the existence of a free advertisement or notice. This structure is common in French, where 'Il y a' translates to 'There is', and it is often followed by a noun, in this case, 'une annonce gratuite', meaning 'a free post'. This construction is used to inform someone about the availability of something, especially in contexts like classified ads or online postings.

The French word for 'single' is 'seul'. It can be used in the same contexts as in English - for example, to describe an individual person or item, or to express loneliness or singularity. Note that 'seul' must agree in gender and number with the noun it modifies, so it can also appear as 'seule', 'seuls', or 'seules' depending on the context.

The French word 'description' is used in the same way as in English. It refers to a spoken or written representation or account of a person, object, or event.