Some french translation adjustment to be made:

Main tab titles
Disposition > Mise en forme
Dessins > Topo
Eléments > Dessiner
Impression > Imprimer (to keep the verbal form used in other tabs)

In "Cavités" tab
in Importer
Image topo > Topo CRP
Mesurage > Topo externe

In "Données" tab
- in Lignes frame
Images Topo > Cheminement

- in Colonnes frame
Données de topo > Données topo
Supplémentaires > Infos suppl.

In "Calculer"
- in Réduction des données frame
Réduction des données > Synthèse des données topo
Images topo > Nb. de visées (Note: Nb. = nombre= number)
Radiales > Nb. de radiales
Longueur total > Développement
Profondeur totale > Amplitude verticale (Note: can be shorten to Ampli. verticale)
Extension > Amplitude horizontale (Note: can be shorten to Ampli. horizontale)

In "Visualiser" tab
Visualiser (first frame) > Mode de visualisation
Visualiser (second frame) > Export visualisation
Image Topo > Filtres de visualisation des données

In "Disposition" tab
Contour > Lignes de niveau
Section transversales > Visées transversales
Profils > Sections
Station Topos > Stations topo
Couleurs/textures > Info. couleurs ou textures

In "Dessins"
- in Dessins frame
Dessins > Topographie
Dessiner > ... I don't like this title but I can't find anything good as the features grouped in this frame are not consistent... I'll suggest grouping the feature in a different manner...
Image Topo > Filtres de visualisation des données

In "Eléments"
Elements visuels > Outils de dessin

Well let's start with this :)

Great thanks.

Re. translation quality, I would say it is often a far too "direct" translation and there quite a few awkward or misleading wordings. The caving vocabulary used in German as much as in English can't be translated directly... obviously there are many similar words but there are maybe more so called "false-friends" and there's a specific caving lingo not directly translatable. My translation are probably discussable but I try to get closer to something more fluid and senseful for native French users.
I don't mind contributing to the translation :)

Komme garnicht damit klar. Leider