Translation guide
The word 'Roomba' refers to a specific brand of robotic vacuum cleaner. In Japanese, it is commonly referred to by the same name, but there are also generic terms for robotic vacuum cleaners.
Roomba (the brand)
Referring specifically to the Roomba brand of robotic vacuum cleaner.
This is the direct loanword for 'Roomba' and is the most common way to refer to the brand in Japanese.
I bought a new Roomba.
Referring to a robotic vacuum cleaner in general, not necessarily the Roomba brand.
This is the generic term for a robotic vacuum cleaner. It literally means 'robot vacuum cleaner'.
I want a robotic vacuum cleaner.
A more casual and friendly term, often used in advertisements or everyday conversation. The prefix 'お' adds politeness.
A shorter version of 'お掃除ロボット', without the polite prefix. Common in product descriptions.
In casual conversation, Japanese speakers sometimes use 'ルンバ' to refer to any robotic vacuum cleaner, similar to how 'Hoover' is used generically in some English-speaking regions. However, in formal or technical contexts, it's better to use 'ロボット掃除機' or '掃除ロボット'.
My friend bought a vacuum cleaner like a Roomba.
The robot vacuum started moving on its own.
Compare the performance of robot vacuums.