Ana, a friend and I walked the Via Turonensis in 2004 and didn't know French either. But we got by with hand signals and the kindness of strangers.
For the first 900km there were very few pilgrim shelters so we stayed in cheap hotels, B&Bs and youth hostels.
If you don't have time to walk the whole way, you could still cover it as a road trip by hopping on local transport between the most important towns.
Start in Paris and visit some of the St Jacques sites before getting a bus or train to Chartres, spending a day or so there. From there you could get transport to Orleans then Amboise, Chatellerault, Poitiers, St Jean d'Angely, Saintes, Pons, Bordeaux and down to Saint Palais (great pilgrim museum here!)
We did a worthwhile side trip by train from Dax to Lourdes. On the way back the train stops at Peyrehorade and you can walk to Bidache from there. Then to Saint Palais, Ostabat and St Jean Pied de Port.
Once you cross over into Spain you can walk the
Camino Frances all the way to Santiago.
buena suerte!
PS: My Spanish teacher in 2001 was from Colombia.