Computer Modern font with accented characters (in XeTeX)

Question

I'd like to use Knuth's Computer Modern font with XeTeX (not with XeLaTeX and so not with a LaTeX package) in a way where I don't have to type accents in a \'-way and without any gimmick such as making accentuated characters active and then say \def\é{\'e}. Is there an extended font that would do such things for me?

If you're happy with (Xe)LaTeX, good for you but please don't try to convince me I should use LaTeX (see comment discussion in Starting with TeX (not LaTeX)). Thanks.

Answer 1

The Computer Modern Unicode cover a big part of Unicode; they are part of TeX Live 2012.

\font\tenrm="CMU Serif:mapping=tex-text"

\tenrm

Praha je hlavní a současně největší město České republiky a
14.~největší město Evropské unie. Leží mírně na sever od středu Čech
na řece Vltavě, uvnitř Středočeského kraje, jehož je správním centrem,
ale jako samostatný kraj není jeho součástí.

Tirana është kryeqendra e qarkut dhe rrethit me të njëtin emër dhe
kryeqyteti i Republikës së Shqipërisë.

İstanbul, Türkiye'nin en kalabalık, iktisadi ve kültürel açıdan en
önemli şehri.

Москва столица Российской Федерации, город федерального значения,
административный центр Центрального федерального округа и центр
Московской области, в состав которой не входит.

Η Αθήνα (Ἀθῆναι στα αρχαία ελληνικά και την καθαρεύουσα) είναι 
η πρωτεύουσα της Ελλάδας. Επίσης είναι η έδρα της Περιφέρειας Αττικής.

\bye

You may need to say

\font\tenrm="[cmunrm.otf]:mapping=tex-text"

if you don't have the fonts installed as system fonts.

The texts are from Wikipedia (pages for Praha, in Czech; for Tirana, in Albanian; for Istanbul, in Turkish; for Moscow, in Russian; for Athens, in Greek).