How many Swahili words come from Arabic?

Estimates commonly place around a third of Swahili vocabulary as Arabic in origin, the legacy of over a thousand years of Indian Ocean trade and Islamic influence along the East African coast.

How does the tool detect a loanword?

It matches each word against a curated dictionary of well-documented Arabic loanwords in Swahili, including Swahilised forms such as kitabu from kitab and safari from safar. It does not guess from spelling.

Why are some Swahili spellings different from Arabic?

Swahili adapted Arabic words to its own sound system and grammar, often adding final vowels, so kitab became kitabu and waqt became wakati. The dictionary stores these Swahilised forms.

Are days, time and numbers included?

Yes. Many time and counting words such as saa (hour), dakika (minute), and several numbers are Arabic in origin and appear in the dictionary.

Does my text leave the browser?

No. Matching happens against the built-in list entirely on your device. Your text is never uploaded or stored.

What is the Swahili Arabic Loanword Detector?

Highlights Arabic loanwords in Swahili such as kitabu, duka, habari and saa, which form the largest category of borrowed words in Swahili thanks to centuries of coastal trade and Islamic contact. It runs free in your browser on Gera Tools, with nothing uploaded.

Swahili Arabic Loanword Detector

Name: Swahili Arabic Loanword Detector
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

Swahili, the great lingua franca of East Africa, grew at the meeting point of Bantu Africa and the Arab and Persian trading world of the Indian Ocean. Over a thousand years of commerce and Islamic contact deposited a deep layer of Arabic loanwords — words like kitabu (book), duka (shop), habari (news) and saa (hour/clock). Arabic is by far the largest source of borrowed words in Swahili. This tool scans your Kiswahili text and highlights those Arabic loanwords, showing the likely Arabic source for each.

How it works

The detector tokenises your text and looks each word up (case-insensitively) in a curated dictionary of documented Arabic loanwords. The dictionary stores the Swahilised spellings that the language actually uses, since Arabic words were adapted to Swahili phonology — typically by adding a final vowel:

kitabu  ← kitāb (book)     safari  ← safar (journey)
saa     ← sāʿa (hour)      wakati  ← waqt (time)
habari  ← khabar (news)    duka    ← dukkān (shop)
hesabu  ← ḥisāb (maths)    rafiki  ← rafīq (friend)

Each detected word is reported with its Arabic source and how often it appears, so you can see how heavily a passage draws on Arabic-derived vocabulary.

The history behind the borrowing

Arabic-Swahili contact began along the East African coast — from Somalia down through Kenya, Tanzania, and Mozambique — as Arab and Persian traders established permanent settlements and trading posts from around the 7th century CE onward. The Swahili coast became one of the most important zones of Indian Ocean commerce, dealing in gold, ivory, and enslaved people. Islam followed trade, and with it came Arabic as the language of religion, law, and literacy.

The linguistic result was not a creole or a mixed language — Swahili remained structurally a Bantu language, retaining the noun class system, the verbal morphology, and the grammatical architecture of the Bantu family. Arabic contributed vocabulary, overwhelmingly in semantic domains connected to the contact: commerce (biashara, trade; duka, shop; hesabu, accounts), time (saa, hour; dakika, minute; wiki, week), religion (sala, prayer; msikiti, mosque; imani, faith), and the objects of trade and urban life.

Domains with high Arabic loan density

Certain Swahili vocabulary domains are heavily Arabic in origin:

Domain	Examples
Time and calendar	saa (hour), dakika (minute), wiki (week), mwezi (some uses)
Commerce	biashara (trade), duka (shop), bei (price), mali (goods)
Religion	sala (prayer), msikiti (mosque), dunia (world), imani (faith)
Knowledge and writing	kitabu (book), kalamu (pen), elimu (knowledge)
Health and body	dawa (medicine), afya (health), roho (soul)
Greetings and social	habari (news), heshima (respect), rafiki (friend), adabu (manners)

Tips and example

Paste Nilinunua kitabu dukani and the tool flags kitabu (← kitāb) and duka within dukani — the locative form uses the noun class suffix -ni, so the base loanword duka is what the dictionary stores — while leaving native Bantu words like nilinunua alone.

A high count is entirely normal: these Arabic loans are full, everyday members of Swahili. Use the tool to study borrowing patterns, build vocabulary lists, or trace the roots of words you use daily. The dictionary covers common, well-attested loans, so rarer or very modern borrowings may not be detected.