Hi Ahmed,
It happens because your default language is en(US).
In liferay there is one property which can help you .
locale.prepend.friendly.url.style=1bydefault it is set to 1.
So please set it to 2 .
locale.prepend.friendly.url.style=2you can read below comment
#
# Set this to 0 if the locale is not automatically prepended to a URL. This
# means that each URL could potentially point to many different languages.
# For example, the URL http://localhost:8080/web/guest/home could then be
# viewed by users in many different languages.
#
# Set this to 1 if the locale is automatically prepended to a URL when the
# requested locale is not the default locale. This means that each URL
# points to just one language. For example, the URL
# http://localhost:8080/web/guest/home would point to the default language.
# The URL http://localhost:8080/zh/web/guest/home and
# http://localhost:8080/zh_CN/web/guest/home would both point to the Chinese
# language.
#
# In cases where the prepended locale is "zh" and not complete locale
# "zh_CN", then the full locale returned will be based on the order in which
# the locales appear in the property "locales". If "zh_CN" appears before
# "zh_TW", then "zh" will be a short hand for "zh_TW".
#
# The default language is set in system.properties with the properties
# "user.country" and "user.language".
#
# Set this to 2 if the locale is automatically prepended to every URL. This
# means that each URL points to just one language.
#
# Note that each language requires an entry in the property "locales" and a
# servlet mapping in web.xml for the I18n Servlet.
#
