Here are some entirely free pattern to download.

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Mariage - Grille Gratuite
Wedding pattern to stitch
2 free charts to realize your wedding invitations,
wedding menu or thank you cards and your wedding favours.
The complete alphabet is included to personalise your project.

Monogrammes Fleuris - Grille Gratuite
Floral alphabet - monograms
 
Here you can find others free alphabets patterns