German language
In a declarative sentence in English, if the subject does not occur before the predicate, the sentence could well be misunderstood.
However, German's flexible word order allows one to emphasise specific words:
Normal word order:

Der Direktor betrat gestern um 10 Uhr mit einem Schirm in der Hand sein Büro.
The manager entered yesterday at 10 o'clock with an umbrella in the hand his office.
Second variant in normal word order:

Der Direktor betrat sein Büro gestern um 10 Uhr mit einem Schirm in der Hand.
The manager entered his office yesterday at 10 o'clock with an umbrella in the hand.
This variant accentuates the time specification and that he carried an umbrella.
Object in front:

Sein Büro betrat der Direktor gestern um 10 Uhr mit einem Schirm in der Hand.
His office entered the manager yesterday at 10 o'clock with an umbrella in the hand.
The object Sein Büro (his office) is thus highlighted; it could be the topic of the next sentence.
Adverb of time in front:

Gestern betrat der Direktor um 10 Uhr mit einem Schirm in der Hand sein Büro. (aber heute ohne Schirm)
Yesterday entered the manager at 10 o'clock with an umbrella in the hand his office. (but today without umbrella)
Both time expressions in front:

Gestern um 10 Uhr betrat der Direktor mit einem Schirm in der Hand sein Büro.
Yesterday at 10 o'clock entered the manager with an umbrella in the hand his office.
The full-time specification Gestern um 10 Uhr is highlighted.
Another possibility:

Gestern um 10 Uhr betrat der Direktor sein Büro mit einem Schirm in der Hand.
Yesterday at 10 o'clock entered the manager his office with an umbrella in the hand.
Both the time specification and the fact he carried an umbrella are accentuated.
Swapped adverbs:

Der Direktor betrat mit einem Schirm in der Hand gestern um 10 Uhr sein Büro.
The manager entered with an umbrella in the hand yesterday at 10 o'clock his office.
The phrase mit einem Schirm in der Hand is highlighted.
Swapped object:

Der Direktor betrat gestern um 10 Uhr sein Büro mit einem Schirm in der Hand.
The manager entered yesterday at 10 o'clock his office with an umbrella in the hand.
The time specification and the object sein Büro (his office) are lightly accentuated.
The flexible word order also allows one to use language "tools" (such as poetic meter and figures of speech) more freely.

Auxiliary verbs: When an auxiliary verb is present, it appears in second position, and the main verb appears at the end. This occurs notably in the creation of the perfect tense. Many word orders are still possible:

Der alte Mann hat mir heute das Buch gegeben. (The old man has me today the book given.)
Das Buch hat der alte Mann mir heute gegeben. (The book has the old man me today given.)
Heute hat der alte Mann mir das Buch gegeben. (Today has the old man me the book given.)
The main verb may appear in first position to put stress on the action itself. The auxiliary verb is still in second position.

Gegeben hat mir der alte Mann das Buch heute. (Given has me the old man the book today.) The bare fact that the book has been given is emphasized, as well as 'today'.

Modal verbs: Sentences using modal verbs as finite verbs place the infinitive at the end. For example, the English sentence "Should he go home?" would be rearranged in German to say "Should he (to) home go?" (Soll er nach Hause gehen?). Thus, in sentences with several subordinate or relative clauses, the infinitives are clustered at the end. Compare the similar clustering of prepositions in the following (highly contrived) English sentence: "What did you bring that book that I do not like to be read to out of up for?"

Multiple infinitives: German subordinate clauses have all verbs clustered at the end, with the finite verb normally in the final position of the cluster. Given that auxiliaries encode future, passive, modality, and the perfect, very long chains of verbs at the end of the sentence can occur. In these constructions, the past participle formed with ge- is often replaced by the infinitive.

Man nimmt an, dass der Deserteur wohl erschossenV wordenpsv seinperf sollmod
One suspects that the deserter probably shot become be should.
("It is suspected that the deserter probably had been shot")
Er wusste nicht, dass der Agent einen Nachschlüssel hatte machen lassen
He knew not that the agent a picklock had make let
Er wusste nicht, dass der Agent einen Nachschlüssel machen lassen hatte
He knew not that the agent a picklock make let had
("He did not know that the agent had had a picklock made")
The order at the end of such strings is subject to variation, but the second one in the last example is unusual.

Vocabulary: Most German vocabulary is derived from the Germanic branch of the Indo-European language family. However, there is a significant amount of loanwords from other languages, in particular Latin, Greek, Italian, French, and most recently English. In the early 19th century, Joachim Heinrich Campe estimated that one fifth of the total German vocabulary was of French or Latin origin.
Latin words were already imported into the predecessor of the German language during the Roman Empire and underwent all the characteristic phonetic changes in German. Their origin is thus no longer recognizable for most speakers (e.g. Pforte, Tafel, Mauer, Käse, Köln from Latin porta, tabula, murus, caseus, Colonia). Borrowing from Latin continued after the fall of the Roman Empire during Christianisation, mediated by the church and monasteries. Another important influx of Latin words can be observed during Renaissance humanism. In a scholarly context, the borrowings from Latin have continued until today, in the last few decades often indirectly through borrowings from English. During the 15th to 17th centuries, the influence of Italian was great, leading to many Italian loanwords in the fields of architecture, finance and music. The influence of the French language in the 17th to 19th centuries resulted in an even greater import of French words. The English influence was already present in the 19th century, but it did not become dominant until the second half of the 20th century.
Thus, Notker Labeo translated the Aristotelian treatises into pure (Old High) German in the decades after the year 1000. The tradition of loan translation revitalized in the 17th and 18th century with poets like Philipp von Zesen or linguists like Joachim Heinrich Campe, who introduced close to 300 words, which are still used in modern German. Even today, there are movements that promote the substitution of foreign words that are deemed unnecessary with German alternatives.
As in English, there are many pairs of synonyms due to the enrichment of the Germanic vocabulary with loanwords from Latin and Latinized Greek. These words often have different connotations from their Germanic counterparts and are usually perceived as more scholarly.

Historie, historisch – "history, historical", (Geschichte, geschichtlich)
Humanität, human – "humaneness, humane", (Menschlichkeit, menschlich)
Millennium – "millennium", (Jahrtausend)
Perzeption – "perception", (Wahrnehmung)
Vokabular – "vocabulary", (Wortschatz)
Diktionär – "dictionary, wordbook", (Wörterbuch)
probieren – "to try", (versuchen)
proponieren – "to propose", (vorschlagen)

The size of the vocabulary of German is difficult to estimate. The Deutsches Wörterbuch (German Dictionary), initiated by the Brothers Grimm (Jacob and Wilhelm Grimm) and the most comprehensive guide to the vocabulary of the German language, already contained over 330,000 headwords in its first edition. The modern German scientific vocabulary is estimated at nine million words and word groups (based on the analysis of 35 million sentences of a corpus in Leipzig, which as of July 2003 included 500 million words in total).

Orthography: Written texts in German are easily recognisable as such by distinguishing features such as umlauts and certain orthographical features, such as the capitalization of all nouns, and the frequent occurrence of long compounds. Because legibility and convenience set certain boundaries, compounds consisting of more than three or four nouns are almost exclusively found in humorous contexts. (English also can string nouns together, though it usually separates the nouns with spaces: as, for example, "toilet bowl cleaner".)
In German orthography, nouns are capitalized, which makes it easier for readers to determine the function of a word within a sentence. This convention is almost unique to German today (shared perhaps only by the closely related Luxembourgish language and several insular dialects of the North Frisian language), but it was historically common in Northern Europe in the early modern era, including in languages such as Danish which abolished the capitalization of nouns in 1948, and English for a while, into the 1700s.