The other day I encountered a handheld computer-type translation device that, at a guess, I'd say was ten or maybe even fifteen years old: it had single-line dot matrix-type LCD screen for text output, a QWERTY keyboard with tiny rubber buttons and awkwardly-placed keys for other functionality, and a second LCD screen for a built-in game that turned out to be a Breakout clone with two bats, one at the bottom and the other halfway up the screen. After working out what the Italian-language instructions printed on the inside of the lid said, I decided to try it out by punching the "ENG" key to indicate I wanted to translate an English word; taking it easy for a first attempt, I went for "HELLO". After pressing the "ITA" key to get the Italian translation, the device prompted: "HELMET?" apparently in an attempt to find a match for a word it didn't know. Naturally, pressing the ITA key again produced the translation "ELMETO", but even my rather limited knowledge of Italian told me that probably wasn't quite what I was after.
The thing also turned out to have built-in standard phrases for a variety of situations, and pressing the button for day-to-day conversations, I discovered it included "HELLO." Quite why it didn't know that word when I typed it in myself, I couldn't really figure out … Might have been cheaper and less frustrating for the original owner to buy a phrasebook instead of this thing, though :)