This feature has moved from an overview through Rask’s methodology, his traveling life, a close reading of the original text, and his relationship to Grimm. To close, let’s grade this 1818 book from the vantage point of more than two centuries of linguistics since.
What has genuinely held up
The principle “look at grammar, not vocabulary” remains a foundation of comparative and historical linguistics to this day. The observation that vocabulary is easily borrowed while grammar (especially the closed system of inflectional endings) is not has been confirmed repeatedly in later research — though modern contact-linguistics research has shown that under sufficiently intense contact, even grammatical elements can be borrowed, so Rask’s flat claim that “grammar is almost never borrowed” is now received with a caveat, as somewhat too strong. Even so, the broad principle stands. Checking a claim against examples spanning multiple language families, and the integrity of deliberately starting a comparison with an unrelated language, both remain valid methodology today.
Where individual judgments went wrong
But a sound method doesn’t guarantee that every conclusion drawn from it was correct. In this book, Rask concludes that Celtic does not share a common ancestor with Germanic, Latin, and Greek. That judgment was wrong — Celtic was later confirmed as a member of the Indo-European family, through the work of Franz Bopp and others. Rask himself acknowledged the error in later years. Even the right method can be misapplied to a particular case — this isn’t a mark against the method’s credibility. If anything, it’s evidence of health: precisely because the method was testable, the error could be caught and corrected.
Tying together five features
This history-series feature set has traced the work of five figures: Jones’s paragraph, Rask’s prize essay, Grimm’s table, Müller’s lectures, and Jespersen’s single volume of synthesis. Rask’s story adds one more lesson that runs through this whole set: credit doesn’t always stay with the person who made the discovery. The wall of the Danish language, and the lack of a systematized “form” for his findings — circumstances close to accident — left Rask’s name in Grimm’s shadow. But the value of the method itself has survived to this day, entirely independent of whose name stuck to it.
Summary
| Verdict | Subject |
|---|---|
| Genuinely held up | The “grammar over vocabulary” principle, checking across multiple families, starting from an unrelated language |
| Corrected | The flat claim that “grammar is almost never borrowed” (exceptions exist under intense contact) |
| Wrong | Excluding Celtic from the Indo-European family (Rask himself corrected this in later years) |
In a nutshell — the method Rask established remains a foundation of comparative linguistics more than two centuries later. But even the person who used that method could get a particular judgment wrong. The correctness of a method and the correctness of a conclusion are two different things — a lesson common to every figure this feature set has read, repeated once more here.