Post examples of words that are similar but have different genders in different languages

[Tooting Carmen]

A few examples:

ES la leche
FR le lait

ES el mar
FR la mer

ES la cancion
FR le chanson

ES el viaje
PT a viagem

ES el mensaje
PT a mensagem

[Sikeliot]

Italian and Spanish likely have examples of this. Milk in Italian is il latte -- masculine like in French.

[Mens-Sarda]

Italian and Sardinian have tons of cognate words with different genders. Usually it's the Sardinian counterpart that preserves the original Latin gender.

It. l'estate (f) Sar. s'istìu (m) - Eng. summer
It. la primavera (f) Sar. su berànu (m) - Eng. spring
It. la sera (f) Sar. su sero (m) - Eng. evening
It. la notte (f) Sar. su notte (m) - Eng. night
It. il fico (m) Sar. sa figu (f) - Eng. fig
It. la testuggine (f) Sar. su tostòine (m) - Eng. turtle
It. l'orecchio (m) Sar. s'orìja (f) - Eng. ear (the J is pronounced like Y)
It. il dente (m) Sar. sa dente (f) - Eng. tooth
It. l'albero (m) Sar. s'àrvure (f) - Eng. tree
It. il pomodoro (m) Sar. sa pumàta (f) - Eng. tomato
It. il labbro (m) Sar. sa lara/lavra (f) - Eng. lip
It. la pesca (f) Sar. su pèssiche, pèssighe (m) - Eng. peach (Lat. "persica, persicae")
It. l'albicocca (f) Sar. su paracocco, barracocco (m) - Eng. apricot (Lat. "praecocus" = precocious)
It. la neve (f) Sar. su nie (m) - Eng. snow
It. la grandine (f) Sar. su ràndine (m) - Eng. hail
It. il merlo (m) Sar. sa mèrula (f) - Eng. blackbird
It. la lepre (f) Sar. su lèpere (m) - Eng. hare
It. l'arancia (f) Sar. s'arantzu (m) - Eng. orange
It. il cucchiaio (m) Sar. sa cucciàra / cullera (f) - Eng. spoon (cucciàra is typical of north Sardinia, from Spanish "cuchara"; cullera is typical of the south, from Catalan "cullera")
It. la vespa (f) Sar. su 'espe (m) - Eng. wasp
It. il banco (m) - Eng. desk Sar. sa banca (f) - Eng. table
It. il timore (m) Sar. sa timòria (f) - Eng. fear
It. il vestiario (m) Sar. sa bestimenta (f) - Eng. wardrobe, clothes, vestment, elegant dress
It. gli intestini (m) Sar. sas istentìnas (f) - Eng. intestines
It. lo zolfo (m) Sar. sa sùlfera / bùlfera / bùlvera (f) - Eng. sulphur
It. la rapina (f) Sar. s'irrobatoriu (m) - Eng. robbery
It. la ruggine (f) Sar. su ruìnzu (m) - Eng. rust
It. il singhiozzo (m) Sar. sa taccullitta / ticcullitta / tuccullitta / singullitta (f) - Eng. hiccup

[Ouistreham]

ES la cancion
FR le chanson

Error.
Fr. chanson is feminine.

Italian and Spanish likely have examples of this.

Not many I can think of, except for leche / latte.
Actually, Italian (in all of its variants) and Spanish seem to be remarkably consistent ad for grammatical genders.

Sardinian is on the other hand a quite different beast, definitely extraneous to the Italian continuum.

. Fr. Mer is an interesting case. The Romance cognates are masculine, it's feminine in all French dialects, including the Occitan family. But:
- Catalan, being as usual torn between Gallic and Iberian influences, is always hesitating between la mar and el mar.
- Amazingly, in Rhaeto-Romance languages (including Ladino in Italy) the cognate are feminine like in French, which tends to support the view according to which this language group is the residual Eastern extension of the French area. (Of course, that's no much significant in everyday life since the Rhaeto-Romance zone is entirely landlocked in the Southern Alps...).