regex - Regular Expressions for City name

Question

I need a regular Expression for Validating City textBox, the city textbox field accepts only Letters, spaces and dashes(-).

Answer 1

This answer assumes that the letters which @Manaysah refers to also encompasses the use of diacritical marks. I've added the single quote ' since many names in Canada and France have it. I've also added the period (dot) since it's required for contracted names.

Building upon @UIDs answer I came up with,

^([a-zA-Zu0080-u024F]+(?:. |-| |'))*[a-zA-Zu0080-u024F]*$

The list of cities it accepts:

Toronto
St. Catharines
San Fransisco
Val-d'Or
Presqu'ile
Niagara on the Lake
Niagara-on-the-Lake
München
toronto
toRonTo
villes du Québec
Provence-Alpes-C?te d'Azur
?le-de-France
Kópavogur
Gareab?r
Saueárkrókur
Torláksh?fn

And what it rejects:

A----B
------
*******
&&
()
//
\

I didn't add in the use of brackets and other marks since it didn't fall within the scope of this question.

I've stayed away from s for whitespace. Tabs and line feeds aren't part of a city name and shouldn't be used in my opinion.