• Wurdboek fan de Fryske taal: Dictionary of the Frisian language & Dutch dictionaries, Instituut voor de Nederlandse Taal
• Frysker: Frisian-Dutch dictionary
• Oersetter: Frisian-Dutch translation
• LearnFrisian: Frisian-Dutch & Frisian-English dictionary NEW
• Etymological dictionary of West Frisian: farming vocabulary by Stefan Norbruis (2015)
• Wêdenboek fon et Aasters (Woordenboek van het Oosterschellings): dictionary of the Terschelling dialect, by Cornelis Roggen (1976)
• Proeve van een friesch en Nederlandsch woordenboek: Frisian-Dutch dictionary, by Montanus Hettema (1831)
• Expressing low quantities in West-Frisian: a pair, a bit or not much, by Casper Koolmees, dissertation (2021)
• Frisian place-names and place-names in Friesland, by Arjen Versloot, in Onoma (2011)
• Glossarium der friesischen Sprache, besonders in nordfriesischen Mundart: North Frisian dictionary, by Nicolaus Outzen (1837)
• Altfriesisches Wörterbuch: Old Frisian-German dictionary, by Karl von Richthofen (1840)
• A new step in Old Frisian lexicography: introduction by Anne Popkema
• Fryske akademy: Frisian academy (West Frisian)
• Frisian reference grammar by Pieter Meijes Tiersma (1999)
• studies about Frisian, by Eric Hoekstra
• Frisian: standardization in progress of a language in decay, in Germanic standardizations, past to present (2003)
• Phonology & grammar of modern West Frisian by Pieter Sipma (1913)
• Glossary Frisian-English
• Das Nordfriesische, eine bedrohte Minderheitensprache in zehn Dialekten : eine Bestandsaufnahme (survey about the North Frisian dialects) by Nils Århammar, in Sterben die Dialekte aus ? (2008)
• Virtual Frisian: a comparison of language use in North and West Frisian virtual communities, by Guillem Belmar Viernes & Hauke Heyen, in Language documentation & conservation (2021)
• Die nordfriesische Sprache nach der Föhringer und Amrumer Mundart: grammar of the North Frisian, by Christian Johansen (1862)
• Die nordfriesische Sprache nach der Moringer Mundart: grammar of the North Frisian, by Bende Bendsen (1860)
• An introduction to Old Frisian: history, grammar, reader, glossary, by Rolf Bremmer (2009)
• studies about Old Frisian, by Rolf Bremmer
• Codifying the law: Frisian legal manuscripts around 1300, in Vernacular manuscript culture (2018)
• Language contact in medieval Frisia: Middle Low German spelling interferences in Old East Frisian manuscripts, in Filologia germanica (2017)
• The orality of Old Frisian law texts, in Directions for Old Frisian philology (2014)
• Bad Frisian and bad Low German: interference in the writings of a medieval West Frisian, in Multilingua (1997)
• Frisians in Anglo-Saxon England: a historical and toponymical investigation, in Fryske nammen (1981)
• Bilan des études sur le vieux-frison (1992-2021), in Les langues germaniques anciennes et leur philologie (2021)
• The Old Frisian main text by Han Nijdam, in Frisian land law (2023)
• West-Germanic *ai in Frisian by Michiel de Vaan, in Amsterdamer Beiträge zur alteren Germanistik (2011)
• Friesische starke Verben: Frisian strong verbs, by Lennert De Backer (2012)
• studies about Old Frisian, by Arjen Versloot
• Why Old Frisian is still quite old?
• The Runic Frisian vowel system: the earliest history of Frisian and Proto-Insular North Frisian, in Amsterdamer Beiträge zur älteren Germanistik (2014)
• studies about Old Frisian, by Anne Popkema
• Die altfriesische Lexikographie: Dialektologische Aspekte und Normierungsprobleme (2008)
• Frisisk Sproglære: Old Frisian grammar, by Rasmus Rask (1825)
• Frisische Sprachlehre (1834)
• Us Wurk, Tydskrift foar frisistyk: Journal of Frisian Studies, edited by the University of Groningen
• The Frisian language and literature: historical study by Waterman Thomas Hewett (1879)
There are three Frisian languages:
- West Frisian (frysk) (fries in Dutch) spoken in Friesland (Fryslân in Frisian), province in the north of Netherlands.
- East Frisian was spoken in the north-west of Germany, but today there is only the Salter Frisian (seeltersk) spoken in Saterland, a region of Lower Saxony (Seelterlound in Frisian).
- North Frisian (friisk) spoken in North Germany, near the Danish frontier.
• Omrop Fryslân: online radio & television (Friesland)
• Tresoar: library & archives of Fryslân
• Friesche rymlerye by Gysbert Japicx (Gysbert Japiks, poet, 17th century; 1821 edition)
• Us Heit: Lord's Prayer in Frisian (+ audio)
• Bibel: translation of the Bible into the Frisian language, by Eeltsje Boates Folkertsma & Geart Aeilco Wumkes (1943)
• It Ewangeelje fen Matthéwes: The Gospel of Matthew translated into West Frisian, by Justus Hiddes Halbertsma (1884)
Alle minsken wurde frij en gelyk yn weardigens en rjochten berne.
Hja hawwe ferstân en gewisse meikrigen en hearre har foar inoar oer yn in geast fan bruorskip te hâlden en te dragen.
• Universele ferklearring fan de rjochten fan de minske: translation into Western Frisian (+ audio)
→ First article in different languages
→ Universal Declaration of Human Rights: bilingual text in Frisian, Danish & other languages
• Taaldatabank Frysk: Codex Unia (15th century) (WaybackMachine)
• Titus: Old Frisian texts
• Thet freske riim: the oldest Frisian poem
• Altfriesisches Lesebuch: Old Frisian reader with a grammar and a glossary, by Wilhelm Heuser (1903)
• Thet freske riim: text of a 14th-century legal and literary manuscript, presented by Jan van Leeuwen (1835)
→ Netherlands: maps & documents
→ Germany: maps & documents
→ Dutch - Low German & (High) German
→ Germanic languages (in French)