Here is a partnership oath template widely used in many countries: the term “Twin Towns” is most widely used in the UK; The term “twin cities” is generally used for agreements with cities in America.   In continental Europe, the most commonly used terms are “twin cities”, “twin towns”, “twin towns” and “friendly towns”. The European Commission uses the term “twin cities” and refers to the process as “town twinning”.   Spain uses the term “ciudades hermanadas”, which means “twin towns”. Germany, Poland and the Czech Republic use the partner city (De) / miasto partnerskie (Pl) / partnerské město (Cz), which means “twin city” or “partner city”. France uses twin town (twinning, twin town or town), and Italy has gemellaggio (twinning) and comune gemellato (partner municipality).  In the Netherlands, the term “partnerstad or stedenband” (“urban loan” is proposed in case of mutual assistance). In Greece, the word αδελφοπίηηη (adelfopiisi – fraternity) was taken up. In Iceland, the terms vinabæir (cities of friends) and vinaborgir (friendly cities) are used. In the former Soviet bloc were used “twin cities” and “twin cities”  with города-побратимы (Ru) (sworn sister cities).   Twinning is sometimes carried out for political purposes.
The Hungarian city of Gyöngyös was associated with the Azerbaijani city of Shusha in 2013 and signed the partnership agreement with representatives of the Azerbaijani government; Hungary de jure recognized Shusha as part of Azerbaijan, although it was controlled at the time and until 2020 by the Armenian armed forces and the unrectified Arzakh.  In 2003, city councillors in Preston, England, attempted to partner in the name of solidarity with the Palestinian city of Nablus.  In November 2020, U.S. Senator Marsha Blackburn introduced a law, the Sister City Transparency Act, to guarantee federal oversight authority to reduce the risk of partner city agreements being used for political influence campaigns.  In Europe, town twinning is supported by the European Union.    The aid scheme was set up in 1989. In 2003, an annual budget of around €12 million was allocated to some 1,300 projects. The Council of European Municipalities and Regions also works closely with the Commission (DG Education and Culture) to promote modern and high-quality partnership initiatives and exchanges involving all parts of the Community. It has launched a website dedicated to twinning.  From 1995 on, the European Union maintained more than 7,000 bilateral relations involving nearly 10,000 European municipalities, mainly French (2837 twinnings) and German municipalities (2485 twinnings). Although not binding, the signing of a formal “oath” or partnership agreement facilitates the establishment of a long-term relationship of trust. The form and content are not defined and can be modified depending on the nature of the partnership to be created and according to the wishes of the twinned cities….