Note:
(a) Lenta.ru https://en.wikipedia.org/wiki/Lenta.ru
(1999- ; a Moscow-based online newspaper in Russian language, owned by Rambler Media Group which belongs to Prof-Media [ie, not government-owned])
(b) For export model of S-400, the en.wikipedia.org spells in Russian Триумф and in English Triumph (this is the name Russia confers on the missile, whereas NATO reporting name is "SA-21 Growler").
However, in the English-language Web sometimes it is spelled "Triumf." If one checks Russian alphabet https://en.wikipedia.org/wiki/Russian_alphabet
, he or she will learn that the letter F/f in Russian is Ф/ф, respectively for upper and lower cases.
(c)
(i) Regarding quotation 2. In Russia, the frigates are called Project 1161.1, whose NATO reporting name is "Gepard-class."
Russia to supply two Gepard-3.9 Frigates to Vietnam in late 2016. Navy Recognition, Apr 26, 2016 http://navyrecognition.com/index ... m-in-late-2016.html
(lead paragraph: "Russia will supply two Gepard-3.9 (NATO reporting name: Gepard-class) frigates to Vietnamese Navy in the third quarter of 2016, as the Director General of the Zelenodolsk Shipyard named after M Gorky (the manufacturer of Gepard-3.9 frigates), Renat Mistakhov told TASS at the DSA 2016 defense show")
(ii)
(A) Gepard https://en.wikipedia.org/wiki/Gepard
(Gepard is the word for "cheetah" in a number of languages)
The examples given are sourced from Germany and Hungary.
(B) German-English dictionary:
* Gepard (noun masculine): "cheetah (Acinonyx jubatus)" https://en.wiktionary.org/wiki/Gepard
Remember: The first letter of German nouns is always capitalized.
(C) HOWEVER, "Gepard" is definitely not a Russian word.
(iii) The Gepard-class frigates are all for export, according to global security: "Project 1166.1 is the Russian entry in the international market for ships with 1,500-2,000 tons of displacement. Intended for export, the design is the successor to the smaller Koni, Parchim and Grisha corvettes. The Project 1166.1 escort ship is available in various modifications (Gepard-3.2, Gepard-3.9, Gepard-5.1, Gepard-5.3, etc)."
For the last sentence of the quotation, consult en,wikipedia.org: "The Russians have offered five variants [1, 2, 3, 4, 5] for foreign sale." And each variant is subdivided, to create 3.9 for instance.