However, Letzebuergish/Luxemburgish is not an official EU language, because there are also other (stronger) official languages with "EU status" in that country. Several concepts for an EU language policy are being debated: one official language (e.g. English, Interlingua, or Esperanto). several official languages (e.g. English, French, German, Spanish + another topic-dependent language). all national languages as official languages, but with a number of relais languages for translations (e.g. English or Esperanto as relais languages). New immigrants in European countries are expected to learn the host nation's language, but are still speaking and reading their native languages (i.e. Arabic, Hindi, Mandarin Chinese, Swahili and Tahitian) in Europe's increasingly multi-ethnic/multicultural profile. Select bibliography Wolfgang Abbe et al.: Bibliographie Europäische Sprachwissenschaft, 50 vols. Hamburg: Loges 2011. Rüdiger Ahrens (ed.): Europäische Sprachenpolitik / European Language Policy, Heidelberg: Winter 2003. R. E. Asher et al. (eds.): The Encyclopedia of Language and Linguistics, Oxford: Pergamon 1994. Roger Axtell: Do's and Taboos Around the World, White Plains: Benjamin 1993. Andrea Brendler / Silvio Brendler: Europäische Personennamensysteme: Ein Handbuch von Abasisch bis Zentralladinisch, Hamburg: Baar 2007. Jasone Cenoz / Jose F. Valencia: 'Cross-Cultural Communication and Interlanguage Pragmatics: American vs. European Requests', in: Journal of Pragmatics vol. 20 (1996): p. 41-54. Peter Collett: Foreign Bodies: A Guide to European Mannerisms, London: Simon & Schuster 1991. Gyula Décsy: Die linguistische Struktur Europas: Vergangenheit – Gegenwart – Zukunft, Wiesbaden: Harrassowitz 1973. Manfred Görlach (ed.), English in Europe, Oxford: Oxford University Press 2002. Joachim Grzega: EuroLinguistischer Parcours: Kernwissen zur europäischen Sprachkultur, Frankfurt: IKO 2006, (most of the information presented here is a summary of this book—the book was positively reviewed by Norbert Reiter here and by Uwe Hinrichs here) Joachim Grzega: Europas Sprachen und Kulturen im Wandel der Zeit, Tübingen: Narr 2012. Harald Haarmann: Soziologie und Politik der Sprachen Europas, München: dtv 1975. Harald Haarmann: Universalgeschichte der Schrift, 2nd ed., Frankfurt (Main)/New York: Campus 1991. Harald Haarmann: Die Sprachenwelt Europas: Geschichte und Zukunft der Sprachnationen zwischen Atlantik und Ural, Frankfurt (Main): Campus 1993. Martin Haspelmath: "The European Linguistic Area: Standard Average European", in: Martin Haspelmath et al. (eds.), Language Typology and Language Universals, vol. 2, p. 1492–1510, Berlin: de Gruyter 2001. Martin Haspelmath et al. (eds.): The World Atlas of Language Structures, Oxford: Oxford University Press 2005. Bernd Heine / Tania Kuteva: The Changing Languages of Europe, New York/Oxford: Oxford University Press 2006. Leo Hickey / Miranda Stewart (eds.): Politeness in Europe,