Chrome Version: 71.0.3556.0
OS: 11042.0.0

Italian is an official language in Switzerland. Swiss-Italian speakers are used to the "Switzerland QWERTZ" layout that comes in two variants "Switzerland/French QWERTZ" and "Switzerland/German QWERTZ". These differ only in the shift vs non-shift states of French/German letter keys, with the French/German variant allows direct non-shift access to French/German letters. 

There's no "Switzerland/Italian" layout, but there's no problem for Swiss-Italian speakers because all Italian accented letters also exist in French. However, in CrOS (VK and PK) there's currently no option to have their preferred layout (Switzerland QWERTZ) with an Italian language model (LM) for assistive features like suggestions and auto-corrects. 

Currently in CrOS, they probably have to either use the "Italian keyboard" option which is the unfamiliar QWERTY-based layout, or go with "French - Swiss French keyboard" option (which has a familiar layout but runs a French LM) or "German - Swiss keyboard option (which also has a familiar layout, but runs a German LM). Also, the QWERTY Italian layout won't allow Swiss-Italian speakers to type German accented letters that are common in their daily lives, e.g. in place and people names, due to their proximity to neighbouring German-speaking part of Switzerland.

NOTE: Addressing crbug.com/890138 will automatically remove the need to address this kind of issue every time. Especially for cases where the combination of layout+LM is out of personal preference (unlike here it's justified by the official status of Italian the language and Switzerland/QWERTZ the layout).