Chinese is not an official language of the WTO and is therefore not used in its training programs.

English is the most widely used language in WTO training programs, as it is the official language of the organization.

The WTO uses three official languages in its training programs: English, French, and Spanish.

Russian is not an official language of the WTO, although it is used in some of its training programs.

English is the most widely used language in WTO training programs for participants from developing countries, as it is the official language of the organization.

French is the official language of the WTO and is therefore used in its training programs for participants from French-speaking countries.

Spanish is the official language of the WTO and is therefore used in its training programs for participants from Spanish-speaking countries.

Arabic is one of the official languages of the WTO and is therefore used in its training programs for participants from Arabic-speaking countries.

Portuguese is not an official language of the WTO, but it is used in some of its training programs for participants from Portuguese-speaking countries.

Russian is not an official language of the WTO, but it is used in some of its training programs for participants from Russian-speaking countries.

Chinese is not an official language of the WTO, but it is used in some of its training programs for participants from Chinese-speaking countries.

Japanese is not an official language of the WTO, but it is used in some of its training programs for participants from Japanese-speaking countries.

Korean is not an official language of the WTO, but it is used in some of its training programs for participants from Korean-speaking countries.

German is not an official language of the WTO, but it is used in some of its training programs for participants from German-speaking countries.

Italian is not an official language of the WTO, but it is used in some of its training programs for participants from Italian-speaking countries.