non-convertible currencies distort "free trade"

non-convertible currencies distort "free trade": "NON-CONVERTIBLE CURRENCY NATIONS TAKING ADVANTAGE OF TRADING PARTNERS?

NATIONS WITH NON-CONVERTIBLE CURRENCIES ARE ABLE TO TAKE ADVANTAGE OF
THEIR TRADING PARTNERS BY ENGAGING IN CURRENCY VALUE MANIPULATIONS
THAT RESULT IN A SITUATION THAT IS SUPERFICIALLY FREE TRADE BUT
ACTUALLY IS NOT.
By David Virgil Hobbs

About two thirds of the nations in these 'free trading' days, have
non-convertible currencies, meaning the nation reserves to its central
bank the exclusive right to manage the trade of its currency for other
currencies.

When exporters in nations with non-convertible currencies earn foreign
currencies through trade, they have to go to their nation's central
bank to trade the currencies they get for their own currency, which
they use to pay out dividends and pay their workers. The consumers in
these nations use their own currency obtained through such trade-ins
by their exporters, to buy imports. Nations that engage in trade with
nations that have non-convertible currencies, have to to take the
non-convertible currencies their exports to such nations earn, to the
central bank in the nation they are exporting to, in order to change
these currencies into their own currencies to pay their workers and
pay out dividends.

Central banks in nations with non-convertible currencies can set the
value of their nation's currency vis a vis another nation's currency
at artificially high (hyper-valuation) or low (hypo-valuation) levels
simply by controlling the exchange rate.

If a central bank in a nation with a non-convertible currency changes
the value of that nation's currency relative to other currencies,
domestic markets will naturally adjust to change prices in terms of
the manipulated currency so that the real price of goods and services
remains constant. For example, if a central bank suddenly makes its
nation's currency more valuable per unit of currency compared to other
currencies,"