“In Paris they just simply opened their eyes and stared when we spoke to them in French! We never did succeed in making those idiots understand their own language.”

Source: The Kings of Clonmel

Burro Genius: A Memoir (2004)

Source: Vanishing Acts

Bulletin of New York Academy of Medicine, Vol. IV (1928)

Rien n'est humiliant comme de voir les sots réussir dans les entreprises où l'on échoue.
Pt. 1, Ch. 5
Sentimental Education (1869)

This actually first appears in Recent Experiments in Psychology (1950) by Leland Whitney Crafts, Théodore Christian Schneirla, and Elsa Elizabeth Robinson, where it is expressed:
: If we used a different vocabulary or if we spoke a different language, we would perceive a somewhat different world.
Randy Allen Harris, in Rhetoric and Incommensurability (2005), p. 35, and an endnote on p. 138 indicates the misattribution seems to have originated in a misreading of quotes in Patterns Of Discovery: An Inquiry Into The Conceptual Foundations of Science (1958) by Norwood Russell Hanson, where an actual quotation of WIttgenstein on p. 184 is followed by one from the book on psychology.
Misattributed

Source: What Matters Most is How Well You Walk Through the Fire