Thread drift:

It may be just a coincidence that French word for boat and the Swahili word are similar. There are multiple words in other languages that are spelled the same or similarly, but have different origins and, often, different meanings.

Then again, most [all?]living languages absorb words from other languages.

See this excerpt about the history of the Swahili language and the languages it has absorbed:

"The Swahili language, is basically of Bantu (African) origin. It has borrowed words from other languages such as Arabic probably as a result of the Swahili people using the Quran written in Arabic for spiritual guidance as Muslims.

As regards the formation of the Swahili culture and language, some scholars attribute these phenomena to the intercourse of African and Asiatic people on the coast of East Africa. The word "Swahili" was used by early Arab visitors to the coast and it means "the coast". Ultimately it came to be applied to the people and the language....

It is an undeniable truth that Arab and Persian cultures had the greatest influence on the Swahili culture and the Swahili language. To demonstrate the contribution of each culture into the Swahili language, take an example of the numbers as they are spoken in Swahili. "moja" = one, "mbili" = two, "tatu" = three, "nne" = four, "tano" = five, "nane" = eight, "kumi" = ten, are all of Bantu origin. On the other hand there is "sita" = six, "saba" = seven and "tisa" = nine, that are borrowed from Arabic. The Arabic word "tisa" actually replaced the Bantu word "kenda" for "nine". In some cases the word "kenda" is still used. The Swahili words, "chai" = tea, "achari" = pickle, "serikali" = government, "diwani" = councillor, "sheha" = village councillor, are some of the words borrowed from Persian bearing testimony to the older connections with Persian merchants.

The Swahili language also absorbed words from the Portuguese who controlled the Swahili coastal towns (c. 1500-1700AD). Some of the words that the Swahili language absorbed from the Portuguese include "leso" (handkerchief), "meza" (table), "gereza" (prison), "pesa" ('peso', money), etc. Swahili bull-fighting, still popular on the Pemba island, is also a Portuguese legacy from that period. The Swahili language also borrowed some words from languages of the later colonial powers on the East African coast - English (British) and German. Swahilized English words include "baiskeli" (bicycle), "basi" (bus), "penseli" (pencil), "mashine" (machine), "koti" (coat), etc. The Swahilized German words include "shule" for school and "hela" for a German coin."

-snip-

Click Swahili language
for the entire article.